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This chapter describes the commands available to configure an Asynchronous Transfer Mode (ATM) interface in the Cisco 7000 series routers and Cisco 4500 routers, and to configure a serial interface for ATM access in other routers.
For ATM configuration information and examples, refer to the chapter entitled "Configuring ATM" in the Router Products Configuration Guide.
To enable support for ATM adaptation layer 3/4 (AAL3/4) on an ATM interface, use the atm aal aal3/4 interface configuration command.
This command has no arguments or keywords.
Support for AAL3/4 is disabled.
Interface configuration
This command is supported on Cisco 7000 routers. Because Cisco 4500 routers always support both AAL3/4 and AAL5, this command is not required on Cisco 4500 routers.
Only one virtual circuit can exist on a subinterface that is being used for AAL3/4 processing, and that virtual circuit must be an AAL3/4 virtual circuit.
The AAL3/4 support feature requires static mapping of all protocols except IP.
The following example enables AAL3/4 on ATM interface 2/0:
interface atm2/0
ip address 172.21.177.178 255.255.255.0
atm aal aal3/4
atm multicast
atm mid-per-vc
atm pvc
atm smds
interface atm
To identify the ATM ARP server for the IP network or set time-to-live (TTL) values for entries in the ATM ARP table, use the arp-server interface configuration command.
| time-out minutes | Number of minutes a destination entry listed in the ATM ARP server's ARP table will be kept before the server takes any action to verify or time out the entry. |
| nsap nsap-address | NSAP address of the ATM ARP server. |
The ARP server process is disabled. The default time-out value is 20 minutes.
Interface configuration
If an NSAP address is specified, the ARP client on this interface uses the specified host as the ARP server. If an NSAP address is not specified, this interface acts as the ARP server for the logical IP network.
The ATM ARP server takes the following actions if a destination listed in the server's ARP table expires:
This implementation follows RFC 1577, Classical IP over ATM.
To enable the router to engage in address registration and callback functions with the Interim Local Management Interface (ILMI), use the atm address-registration interface configuration command. To disable ILMI address registration functions, use the no form of this command.
This command has no keywords and arguments.
Enabled
Interface configuration
This command enables a router to register its address with the ILMI for callback when specific events occur, such as incoming SNMP traps or incoming new network prefixes.
interface atm 1/0 atm address-registration
atm ilmi-keepalive
To change the maximum number of high-priority cells coming from the destination router to the source router at the burst level on the switched virtual circuit (SVC), use the atm backward-max-burst-size-clp0 map-class configuration command. The no form of this command restores the default.
| cell-count | Maximum number of high-priority cells coming from the destination router at the burst level. Default is -1. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the maximum number of high-priority cells coming from the destination router at the burst level to 800 cells:
atm backward-max-burst-size-clp0 800
To change the maximum number of low-priority cells coming from the destination router to the source router at the burst level on the SVC, use the atm backward-max-burst-size-clp1 map-class configuration command. The no form of this command restores the default value.
| cell-count | Maximum number of low-priority cells coming from the destination router at the burst level. Default is -1. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the maximum number of low-priority cells coming from the destination router at the burst level to 100,000:
atm backward-max-burst-size-clp1 100000
To change the peak rate of high-priority cells coming from the destination router to the source router on the SVC, use the atm backward-peak-cell-rate-clp0 map-class configuration command. The no form of this command restores the default.
| rate | Maximum rate in kilobits per second (kbps) that this SVC can receive high-priority cells from the destination router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the peak rate for high-priority cells from the destination router to 8000 kbps:
atm backward-peak-cell-rate-clp0 8000
To change the peak rate of low-priority cells coming from the destination router to the source router on the SVC, use the atm backward-peak-cell-rate-clp1 map-class configuration command. The no form of this command restores the default.
| rate | Maximum rate in kilobits per second (kbps) that this SVC can receive low-priority cells from the destination router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the peak rate for low-priority cells from the destination router to 7000 kbps:
atm backward-peak-cell-rate-clp1 7000
To change the sustainable rate of high-priority cells coming from the destination router to the source router on the SVC, use the atm backward-sustainable-cell-rate-clp0 map-class configuration command. The no form of this command restores the default.
| rate | Sustainable rate in kilobits per second (kbps) that this SVC can receive high-priority cells from the destination router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the sustainable rate for high-priority cells from the destination router to 800 kbps:
atm backward-sustainable-cell-rate-clp0 800
To change the sustainable rate of low-priority cells coming from the destination router to the source router on the SVC, use the atm backward-sustainable-cell-rate-clp1 map-class configuration command. The no form of this command restores the default value.
| rate | Sustainable rate in kilobits per second (kbps) that this SVC can receive low-priority cells from the destination router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the sustainable rate for low-priority cells from the destination router to 700 kbps:
atm backward-sustainable-cell-rate-clp1 700
To cause the AIP to generate the transmit clock internally, use the atm clock internal interface configuration command. The no form of this command restores the default value.
This command has no arguments or keywords.
The AIP uses the transmit clock signal from the remote connection (the line). The switch provides the clocking.
Interface configuration
This command is meaningless on a 4B/5B PLIM.
The following example causes the AIP to generate the transmit clock internally:
atm clock interna l
To enter the End Station ID (ESI) and selector byte fields of the ATM NSAP address, use the atm esi-address interface configuration command. The NSAP address prefix is filled in via ILMI from the ATM switch.
| esi | End Station Id field value in hexadecimal; 6 bytes long. |
| selector | Selector field value in hexadecimal; 1 byte long. |
Interface configuration
This command applies to the Cisco 7000 series, the Cisco 7500 series, the Cisco 4500, and the Cisco 4700 routers.
Before Cisco IOS Release 11.0, ATM addresses were configured on the router only by use of the atm nsap-address interface configuration command. The complete 20-byte NSAP (40 hexadecimal characters) had to be configured.
The atm esi-address command allows the ATM address to be configured by entering the ESI (12 hexadecimal characters) and the selector byte (2 hexadecimal characters). The ATM prefix (26 hexadecimal characters) will be provided by the ATM switch.To get the prefix from the ATM switch, the ILMI PVC must be configured on the router and the ATM switch must be able to supply a prefix via ILMI.
The atm esi-address and atm nsap-address commands are mutually exclusive. Configuring the router with the atm esi-address command negates the atm nsap-address setting, and vice versa.
The ILMI PVC must be configured in order to get an NSAP address prefix from the switch.
This example shows the router's configuration after setting up a PVC for communication with the switch via ILMI and entering the value
303132333435.36
in the esi-address command.
inverness#show running-config
Building configuration...
Current configuration:
!
!
interface ATM2/0
ip address 1.1.1.1 255.255.255.0
map-group atm1
atm esi-address 303132333435.36
atm pvc 1 0 5 qsaal
atm pvc 2 0 16 ilmi
!
atm nsap-address
atm pvc ilmi
To set the exception-queue length, use the atm exception-queue interface configuration command. The no form of this command restores the default value.
| number | Number of entries in the range of 8 to 256. Default is 32 entries. |
32 entries
Interface configuration
This command is supported on the Cisco 7000, but not on the Cisco 4500.
The exception-queue is used for reporting ATM events, such as CRC errors.
In the following example, the exception-queue is set to 50 entries:
atm exception-queue 50
To change the maximum number of high-priority cells going from the source router to the destination router at the burst level on the SVC, use the atm forward-max-burst-size-clp0 map-class configuration command. The no form of this command restores the default value.
| cell-count | Maximum number of high-priority cells going from the source router at the burst level. Default is -1. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the maximum number of high-priority cells going from the source router at the burst level to 100,000:
atm forward-max-burst-size-clp0 100000
To change the maximum number of low-priority cells going from the source router to the destination router at the burst level on the SVC, use the atm forward-max-burst-size-clp1 map-class configuration command. The no form of this command restores the default value.
| cell-count | Maximum number of low-priority cells going from the source router at the burst level. Default is -1. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the maximum number of low-priority cells going from the source router at the burst level to 100,000:
atm forward-max-burst-size-clp1 100000
To change the peak rate of high-priority cells going from the source router to the destination router on the SVC, use the atm forward-peak-cell-rate-clp0 map-class configuration command. The no form of this command restores the default value.
| rate | Maximum rate in kilobits per second (kbps) that this SVC can send high-priority cells from the source router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the peak high-priority cell rate from the source router to 1000 Kbps:
atm forward-peak-cell-rate-clp0 1000
To change the peak rate of low-priority cells coming from the source router to the destination router on the SVC, use the atm forward-peak-cell-rate-clp1 map-class configuration command. The no form of this command restores the default value.
| rate | Maximum rate in kilobits per second (kbps) that this SVC can send low-priority cells from the source router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the peak low-priority cell rate from the source router to 100,000 kbps:
atm forward-peak-cell-rate-clp1 100000
To change the sustainable rate of high-priority cells coming from the source router to the destination router on the SVC, use the atm forward-sustainable-cell-rate-clp0 map-class configuration command. The no form of this command restores the default value.
| rate | Sustainable rate in kilobits per second (kbps) that this SVC can send high-priority cells from the source router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp0 indicates that this command affects only cells with a cell loss priority (CLP) of 0 (high-priority cells).
The following example sets the sustainable rate for high-priority cells from the source router to100,000 kbps:
atm forward-sustainable-cell-rate-clp0 100000
To change the sustainable rate of low-priority cells coming from the source router to the destination router on the SVC, use the atm forward-sustainable-cell-rate-clp1 map-class configuration command. The no form of this command restores the default value.
| rate | Sustainable rate in kilobits per second (kbps) that this SVC can send low-priority cells from the source router. Default is -1. Maximum upper range is 155,000 kbps. |
-1. The router does not request this quality of service (QOS) parameter of the ATM switch, so the switch provides a "best effort service." The switch will drop cells if there is not enough buffer space.
Map-class configuration
This command is supported on Cisco 7000 but not on Cisco 4500 and Cisco 4700 routers.
This command defines a quality of service (QOS) parameter for the SVC connection.
The keyword clp1 indicates that this command affects only cells with a cell loss priority (CLP) of 1 (low-priority cells).
The following example sets the sustainable rate for low-priority cells from the source router to100,000 kbps:
atm forward-sustainable-cell-rate-clp1 10000 0
To specify DS3 line framing on Cisco 4500 routers, use the following form of the atm framing interface configuration command. To return to the default C-Bit with Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.
| m23adm | (Optional) Specifies M-23 ATM Direct Mapping. |
| cbitplcp | (Optional) Specifies C-Bit with PLCP framing. |
| m23plcp | (Optional) Specifies M-23 with PLCP framing. |
No framing
Interface configuration
This command is available only on Cisco 4500 routers with DS3 access speeds. This command is not available on the Cisco 7000.
Framing on the interface must match that on the switch for this ATM link.
The following example specifies M-23 ADM framing on a Cisco 4500 router that has been set up with DS3 access to an ATM network:
atm framing m32adm
To specify E3 line framing, use the atm framing interface configuration command. To return to the default G.751 Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.
| g832adm | (Required for Cisco 7000 routers; optional for Cisco 4500 routers) Specifies G.832 ATM Direct Mapping. |
| g751adm | (Optional) Specifies G.751 ATM Direct Mapping. |
No framing
Interface configuration
This command is available on the Cisco 7000 and Cisco 4500 with E3 access speeds. This command is not available on the Cisco 7000 with DS3 access speeds; that combination supports only one type of line framing. The default framing is described in the ITU-T Recommendation G.751.
Framing on the interface must match that on the switch for this ATM link.
The following example specifies G.832 ADM framing on a Cisco 7000 router that has been set up with E3 access to an ATM network:
atm framing g832adm
To change the idle timer for SVCs on an interface that will cause the SVCs to disconnect when inactive for a specified interval, use the atm idle-timeout interface configuration command. To return to the default setting, use the no form of this command.
| seconds | Number of seconds the SVC can be inactive before disconnecting. Setting seconds to 0 disables idle timeouts. |
300 seconds
Interface configuration
To disable idle timeouts entirely, set the value of seconds to zero.
Prior to Cisco IOS Release 11.0, idle timeouts were not supported; that is, the prior configuration was equivalent to atm idle-timeout 0. Installing Release 11.0 without reconfiguration sets the idle timeout period to the default 120 seconds.
To enable ILMI keepalives, use the atm ilmi-keepalive interface configuration command. To disable ILMI keepalives, use the no form of this command.
| seconds | Number of seconds between keepalives. The default is 3 seconds. Values less than 3 seconds are rounded to 3 seconds, and there is no upper bound to the range of values. |
3 seconds
Interface configuration
The following example enables ILMI keepalives for the ATM interface 1/0:
interface atm 1/0 atm address-registration atm ilmi-keepalive
atm address-registration
To set the ceiling value of the virtual circuit descriptor (VCD) on the AIP card, use the atm maxvc interface configuration command. To restore the default value, use the no form of this command.
| number | Maximum number of supported virtual circuits. Valid values are 256, 512, 1024, 2048, or 4096. Default is 2048. |
2048 virtual circuits
Interface configuration
This command is supported on the Cisco 7000; it is not supported on the Cisco 4500, which has a fixed maximum of 1024.
This command sets the maximum value supported for the vcd argument in the atm pvc command. It also determines the maximum number of virtual circuits on which the AIP allows segmentation and reassembly (SAR) to occur.
However, if you set a maxvc limit and then enter the atm pvc command with a larger value for the vcd argument, the software does not generate an error message.
This command does not affect the VPI/VCI of each virtual circuit.
The following example sets a ceiling VCD value of 1024 and restricts the AIP to supporting at most 1024 virtual circuits:
atm maxvc 1024
To limit the number of message identifier (MID) numbers allowed on each virtual circuit, use the atm mid-per-vc interface configuration command.
| maximum | Number of MIDs allowed per virtual circuit on this interface. The values allowed are 16, 32, 64, 128, 256, 512, and 1024. The default is 16 MIDs per virtual circuit. |
The default limit is 16 MIDs per virtual circuit.
Interface configuration
This command is supported on Cisco 7000, Cisco 4500, and Cisco 4700 routers.
Message identifier (MID) numbers are used by receiving devices to reassemble cells from multiple sources into packets.
This command limits the number of discrete messages allowed on the PVC at the same time. It does not limit the number of cells associated with each message.
The maximum set by the atm mid-per-vc command overrides the range between the midhigh and midlow values set by the atm pvc command. If you set a maximum of 16 but a midlow of 0 and a midhigh of 255, only 16 MIDs (not 256) will be allowed on the virtual circuit.
The following example allows 64 MIDs per ATM virtual circuit:
atm mid-per-vc 64
atm pvc
To assign an SMDS E.164 multicast address to the ATM subinterface that supports AAL3/4 and SMDS encapsulation, use the atm multicast interface configuration command.
| address | Multicast E.164 address assigned to the subinterface. |
No multicast E.164 address is defined.
Interface configuration
This command is supported on Cisco 7000, Cisco 4500, and Cisco 4700 routers.
Each AAL3/4 subinterface is allowed only one multicast E.164 address. This multicast address is used for all protocol broadcast operations.
The following example assigns a multicast E.164 address to the ATM subinterface that is being configured:
atm multicast e180.0999.000
atm aal aal3/4
atm pvc
atm smds
interface atm
To specify how often new destinations can be added to multipoint calls to an ATM switch in the network, use the atm multipoint-interval interface configuration command. To return to the default interval, use the no form of this command.
| interval | Interval length in seconds, in the range between 0 and 4294967. The default is 30 seconds. |
30 seconds
Interface configuration
This command applies to SVCs only, not to PVCs.
This command has no effect unless ATM multipoint signaling is enabled on the interface.
atm multipoint-signaling
To enable point-to-multipoint signaling to the ATM switch, use the atm multipoint-signaling interface configuration command. To disable point-to-multipoint signaling to the ATM switch, use the no form of this command.
This command has no keywords and arguments.
Interface configuration
Interface configuration
If multipoint signaling is enabled, the router will use existing static map entries that have the broadcast keyword set to establish multipoint calls. One call will be established for each logical subnet of each protocol.
All destinations are added to the call. One multicast packet is sent to the ATM switch for each multipoint call. The ATM switch replicates the packet to all destinations.
The atm multipoint-interval command determines how often new destinations can be added to a multipoint call.
atm multipoint-interval
To define an ATM map statement for an SVC, use the atm-nsap map-list configuration command in conjunction with the map-list global configuration command. The no form of this command removes the address.
| protocol | One of the following keywords: appletalk, apollo, bridge, clns, decnet, ip, ipx, vines, xns. |
| protocol-address | Destination address that is being mapped to this SVC. |
| atm-nsap-address | Destination ATM NSAP address. Must be exactly 40 hexadecimal digits long and in the correct dotted format. |
| class class-name | (Optional) Name of a table that contains encapsulation-specific parameters. Such a table can be shared between maps that have the same encapsulation. |
| broadcast | (Optional) Indicates this map entry is to be used when the corresponding protocol sends broadcast packets to the interface (for example, IGRP updates). |
No map statements are defined.
Map-list configuration
This command is required with the map-list command when you are configuring an SVC.
In the following example, a map list named atmsvc includes one map statement for a destination address being mapped:
map-list atmsvc ip 172.21.97.17 atm-nsap AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 class qos broadcast
map-list
To set the NSAP address for an ATM interface using SVC mode, use the atm nsap-address interface configuration command. The no form of this command removes any configured address for the interface.
| nsap-address | The 40-digit (hexadecimal) NSAP address of this interface (the source address). |
No NSAP address is defined for this interface.
Interface configuration
When you are configuring an SVC, the atm nsap-address command is required, as it defines the source NSAP address. It identifies a particular port on the ATM network and must be unique across the network.
Configuring a new address on the interface will overwrite the previous address. The router considers the address as a string of bytes and will not prefix or suffix the address with any other strings or digits. The complete NSAP address must be specified, because this value will be used in the Calling Party Address Information Element in the SETUP message to establish a virtual circuit.
ATM NSAP addresses have a fixed length of 40 hexadecimal digits. You must configure the complete address in the following dotted format:
xx.xxxx.xx.xxxxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx
In the following example, the source NSAP address for the interface is AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12:
atm nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
To create a permanent virtual circuit (PVC) on the AIP or NPM interface and, optionally, to generate OAM F5 loopback cells or enable Inverse ATM ARP, use the atm pvc interface configuration command. The no form of this command removes the specified PVC.
| vcd | Virtual circuit descriptor. A unique number per AIP that identifies to the AIP which VPI/VCI to use for a particular packet. Valid values range from 1 to the value set with the atm maxvc command. The AIP requires this feature to manage packet transmission. The vcd is not associated with the VPI/VCI used for the ATM network cells. |
| vpi | ATM network virtual path identifier (VPI) of this PVC. On the Cisco 7000 series, this value ranges from 0 through 255; on the Cisco 4500 and Cisco 4700, this value ranges from 0 to (8192 divided by the value set by the atm vc-per-vp command) minus one. The VPI is an 8-bit field in the header of the ATM cell. The VPI value is unique only on a single link, not throughout the ATM network (it has local significance only). The vpi value must match that of the switch. Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. |
| vci | ATM network virtual channel identifier (VCI) of this PVC, in the range of 0 through one less than the maximum value set for this interface by the atm vc-per-vp command. The VCI is a 16-bit field in the header of the ATM cell. The VCI value is unique only on a single link, not throughout the ATM network (it has local significance only). Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. |
| aal-encap | ATM adaptation layer (AAL) and encapsulation type. When aal5mux is specified, a protocol is required. Possible values are as follows: · aal34smds (encapsulation for SMDS networks) · aal5nlpid (encapsulation that allows ATM interfaces to interoperate with HSSI interfaces that are using an ADSU and running ATM-DXI) · aal5mux decnet (a MUX-type virtual circuit) · aal5mux ip (a MUX-type virtual circuit) · aal5mux novell (a MUX-type virtual circuit) · aal5mux vines (a MUX-type virtual circuit) · aal5mux xns (a MUX-type virtual circuit) · aal5snap (LLC/SNAP precedes the protocol datagram). This is the only encapsulation supported for Inverse ARP. · ilmi (used to set up communication with the ILMI); the associated vpi and vci values are ordinarily 0 and 16, respectively. · qsaal (a signaling-type PVC used for setting up or tearing down SVCs); the associated vpi and vci values are ordinarily 0 and 5, respectively. |
| midlow | (Optional) Starting message identifier (MID) number for this PVC. The default is 0. If you set the peak, average, and burst values, you must also set the midlow and midhigh values. |
| midhigh | (Optional) Ending MID number for this PVC. The default is 0.If you set the peak, average, and burst values, you must also set the midlow and midhigh values. |
| peak | (Optional) Maximum rate (in kbps) at which this virtual circuit can transmit. Valid values are in the range from 1 to the maximum rate set for a rate queue. The value should match a value specified by the atm rate-queue command. If you set this value, you must also specify a value for the average, burst, midlow and midhigh arguments. |
| average | (Optional) Average rate (in kbps) at which this virtual circuit will transmit. Valid values are in the range from 1 to the maximum rate set for a rate queue. If you set this value, you must also specify a value for the peak, burst, midlow and midhigh arguments. |
| burst | (Optional) Value (in the range 1 through 2047) that relates to the maximum number of ATM cells the virtual circuit can transmit to the network at the peak rate of the PVC. The actual burst cells equals burst * 32 cells, thereby allowing for a burst size of 32 cells to 65504 cells. The largest practical value of burst is the MTU size of the AIP card. If you set this value, you must also specify a value for the peak and average arguments. |
| oam seconds | (Optional) Specifies how often to generate an OAM F5 loopback cell from this virtual circuit. The default value is 10 seconds. |
| inarp minutes | (Optional) Specifies how often Inverse ARP datagrams will be sent on this virtual circuit. The default value is 15 minutes. |
If peak and average rates are omitted, the PVC defaults to the highest bandwidth rate-queue available. Peak and average rates are then equal. By default, the virtual circuit is configured to run as fast as possible.
The default value of both midlow and midhigh is 0.
If the oam keyword is omitted, OAM cells are not generated. If the oam keyword is present but the seconds value is omitted, the default value of oam seconds is 10 seconds.
If the inarp keyword is missing, Inverse ARPs are not generated. If the inarp keyword is present, but the timeout value is not given, then Inverse ARPs are generated every 15 minutes.
Interface configuration
The order of command options is important. Inarp can either be specified separately or after oam has been enabled. The peak, average, and burst arguments, if specified, cannot be specified after either the inarp or the oam keywords.
The Cisco IOS software dynamically creates rate queues as necessary to satisfy the requests of atm pvc commands. The software dynamically creates a rate queue when an atm pvc command specifies a peak/average rate that does not match any user-configured rate queue.
The atm pvc command creates a PVC and attaches it to the VPI and VCI specified. Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. The aal-encap argument determines the AAL mode and the encapsulation method used. The peak and average arguments determine the rate queue used.
Use one of the aal5mux encapsulation options to dedicate the specified virtual circuit to a single protocol; use the aal5snap encapsulation option to multiplex two or more protocols over the same virtual circuit. Whether you select aal5mux or aal5snap encapsulation might depend on practical considerations, such as the type of network and the pricing offered by the network. If the network's pricing depends on the number of virtual circuits set up, aal5snap might be the appropriate choice. If pricing depends on the number of bytes transmitted, aal5mux might be the appropriate choice because it has slightly less overhead.
If you choose to specify any of the peak, average and burst values, you must specify all three values. You can specify midlow and midhigh values only if you have also specified the peak, average, and burst values.
Message identifier (MID) numbers, which are available only with AAL3/4, are used by receiving devices to reassemble cells from multiple packets. You can assign different midlow to midhigh ranges to different PVCs to ensure that the message identifiers will be unique at the receiving end and, therefore, that messages can be reassembled correctly.
If you are configuring an SVC, this command is required to configure the PVC that handles the SVC call setup and termination. In this case, specify qsaal for the aal-encap argument. See the third example that follows.
The router generates and echoes OAM F5 loopback cells, which verify connectivity. Once OAM cell generation is enabled, a cell is transmitted periodically. The remote end must respond by echoing back the cells.
The router does not generate Alarm Indication Signal (AIS) cells, which are used for alarm surveillance functions. However, if it receives an AIS cell, it responds by sending an OAM Far-end Remote Failure (FERF) cell.
The following example creates a PVC with VPI 0 and VCI 6. The PVC uses AAL aal5mux with IP protocol.
atm pvc 1 0 6 aal5mux ip
The following example creates a PVC with VPI 0 and VCI 6. The PVC uses AAL aal3/4-SMDS protocol.
atm pvc 1 0 6 aal34smds 0 15 150000 70000 10
The following example creates a PVC to be used for ATM signaling for an SVC. It specifies VPI 0 and VCI 5.
atm pvc 1 0 5 qsaal
Assuming that no static rate queue has been defined, the following example creates the PVC and also creates a dynamic rate queue with the peak rate set to the maximum allowed by the PLIM and the average set to equal the peak rate:
atm pvc 1 1 1 aal5snap
Assuming that no static rate queue has been defined, the following example creates the PVC and also creates a dynamic rate queue with the peak rate set to100 Mbps (100,000 Kbps), the average rate set to 50 Mbps (50,000 Kbps), and a burst size of 64 cells (2 * 32 cells):
atm pvc 1 1 1 aal5snap 100000 50000 2
atm aal aal3/4
atm maxvc
atm multicast
atm rate-queue
atm smds
mtu
To create a permanent rate queue for the AIP on the Cisco 7000 or for the NPM on the Cisco 4500, use the atm rate-queue interface configuration command. The no form of this command removes the rate queue.
| queue-number | Queue number in the range 0 through 7 for the Cisco 7000, and in the range 0 through 3 for the Cisco 4500. Queues 0 through 3 are in the high-priority bank, and queues 4 through 7 are in the low-priority bank. Queues in the same priority bank have the same priority; for example, queues 0 and 3 have the same priority. |
| speed | Speed in megabits per second (Mbps) in the range from 1 through 155. The maximum speed is determined by the detected PLIM type on the AIP or NPM: · 34 Mbps for E3 · 45 Mbps for DS-3 · 100 Mbps for TAXI · 155 Mbps for SONET |
No rate-queue is defined.
Interface configuration
If you do not create permanent rate queues or if you create PVCs with peak/average rates that are not matched by the rate queues you configure, the software will dynamically create rate queues as necessary to satisfy the requests of the atm pvc commands.
You can create multiple rate queues. A warning message appears if all rate queues are deconfigured or if the combined rate-queues exceed the PLIM rate.
In the following example, rate queue 1 is configured for 100 Mbps:
atm rate-queue 1 100
atm pvc
To define the AIP raw-queue size, use the atm rawq-size interface configuration command. The no form of this command restores the default value.
| number | Maximum number of cells in the raw queue simultaneously, in the range 8 through 256. Default is 32. |
32 cells
Interface configuration
This command is supported on the Cisco 7000, but not on the Cisco 4500.
The raw queue is used for raw ATM cells, which include OAM (F4 and F5) and Interim Local Management Interface (ILMI) cells.
In the following example, a maximum of 48 cells are allowed in the raw queue:
atm rawq-size 48
To set the maximum number of Receive buffers for simultaneous packet reassembly, use the atm rxbuff interface configuration command. The no form of this command restores the default value.
| number | Maximum number of packet reassemblies that the AIP can perform simultaneously, in the range 0 through 512. Default is 256. |
256 packet reassemblies
Interface configuration
This command is supported on the Cisco 7000, but not on the Cisco 4500.
In the following example, the AIP can perform a maximum of 300 packet reassemblies simultaneously:
atm rxbuff 300
To disconnect an SVC, use the atmsig close EXEC command.
| slot | Slot number. |
| vcd | Virtual circuit descriptor of the signaling PVC to close. |
EXEC
Execute this command if you want to close a particular SVC. Since virtual circuits are numbered per interface, you must specify which ATM interface by its slot number.
The following example closes SVC 2 on ATM interface 4/0:
atmsig close atm4/0 2
To assign a unicast E.164 address to the ATM subinterface that supports AAL3/4 and SMDS encapsulation, use the atm smds-address interface configuration command.
| address | Unicast E.164 address assigned to the subinterface. |
No E.164 address is assigned.
Interface configuration
This command is supported on Cisco 7000, Cisco 4500, and Cisco 4700 routers.
Each AAL3/4 subinterface is allowed only one unicast E.164 address.
The following example assigns a unicast E.164 address to the ATM subinterface that is being configured:
atm smds-address c141.555.1212
atm aal aal3/4
atm multicast
atm pvc
interface atm
To set the mode of operation and thus control type of ATM cell used for cell-rate decoupling on the SONET PLIM, use the atm sonet interface configuration command. The no form of this command restores the default STS-3c operation.
| stm-1 | SDH/STM-1 operation (ITU-T specification).(1) |
STS-3c
Interface configuration
Use STM-1 in applications where the ATM switch requires "idle cells" for rate adaptation. An idle cell contains 31 zeros followed by a one.
Use the default (STS-3c) in applications where the ATM switch requires "unassigned cells" for rate adaptation. An unassigned cell contains 32 zeros.
The following example specifies ATM SONET STM-1:
atm sonet stm-1
To set the maximum number of Transmit buffers for simultaneous packet fragmentation, use the atm txbuff interface configuration command. The no form of this command restores the default value.
| number | Maximum number of packet fragmentations that the AIP can perform simultaneously, in the range 0 through 512. Default is 256. |
256 packet fragmentations
Interface configuration
This command is supported on the Cisco 7000 AIP, but not on the Cisco 4500 NPM.
In the following example, the AIP is configured to perform up to 300 packet fragmentations simultaneously:
atm txbuff 300
To define an ATM map statement for a PVC, use the atm-vc map-list configuration command in conjunction with the map-list global configuration command. The no form of this command removes the address.
| protocol | One of the following keywords: appletalk, apollo, bridge, clns, decnet, ip, ipx, vines, xns. |
| protocol-address | Destination address that is being mapped to this PVC. |
| vcd | Virtual circuit descriptor of the PVC. |
| broadcast | (Optional) Indicates that this map entry is to be used when the corresponding protocol sends broadcast packets to the interface (for example, IGRP updates). Provides pseudobroadcasting support. |
No map statements are defined.
Map-list configuration
When operating in PVC mode, multicast capabilities may not exist in the ATM switch. For this reason, all static maps for a specific protocol should be marked as broadcast for multicasting. When a protocol is sending a packet to its multicast address, all static maps marked as broadcast will get a copy of that packet. This procedure simulates the multicast environment of a LAN.
Some switches may have point-to-multipoint PVCs that do the equivalent process. If one exists, then that PVC may be used as the sole broadcast PVC for all multicast requests.
In the following example, a map list named atm includes two map statements for protocol addresses being mapped:
map-list atm ip 172.21.168.112 atm-vc 1 broadcast decnet 10.2 atm-vc 2 broadcast
map-list
To set the maximum number of VCIs to support per VPI, use the atm vc-per-vp interface configuration command. The no form of this command restores the default value.
| number | Maximum number of VCIs to support per VPI. On the Cisco 7000 AIP, valid values are 32, 64, 128, 256, 512, 1024, 2048, or 4096. On the Cisco 4500 NPM, valid values are 32, 64, 128, 256, 512, 1024, 2048, 4096, or 8192. Default is 1024. |
1024
Interface configuration
This command controls the memory allocation in the AIP to deal with the VCI table. It defines the maximum number of VCIs to support per VPI; it does not bound the VCI numbers.
An invalid VCI causes a warning message to be displayed.
In the following example, the maximum number of VCIs to support per VPI is set to 512:
atm vc-per-vp 512
atm pvc
To set the AIP filter register, use the atm vp-filter interface configuration command. The no form of this command restores the default value.
| hexvalue | Value in hexadecimal format. Default is 0x7B. |
0x7B
Interface configuration
This command is supported on the Cisco 7000 AIP, but not on the Cisco 4500 NPM.
This command configures the hexadecimal value used in the VP filter register in the reassembly operation. The VP filter comprises 16 bits. The VP Filter Register uses the most significant bits (bits 15 through 8, the left half of the filter) as mask bits and uses bits 7 through 0 (the right half of the filter) as compare bits. When a cell is received, the right half of the filter is exclusively NORed with the binary value of the incoming VPI. The result is then ORed with the left half of the filter (the mask). If the result is all ones, then reassembly is done using the VCI/MID table (AAL3/4 processing). Otherwise, reassembly is done using the VPI/VCI table (AAL5 processing).
In other words, this command allows a way to specify which VPI (or range of VPIs) will be used for AAL3/4 processing; all other VPIs map to AAL5 processing. If only AAL5 processing is desired, the VP filter can default or be set to an arbitrary VPI and AAL5 processing will be performed on all VPIs.
In the following example, all incoming cells will be reassembled using AAL3/4 processing:
atm vp-filter ff00
In the following example, all incoming cells with VP=0 will be reassembled using AAL3/4 processing; all other cells will be reassembled using AAL5 processing:
atm vp-filter 0
In the following example, all incoming cells with the most significant bit of the VP set will be reassembled using AAL3/4; all other cells will be reassembled using AAL5 processing:
atm vp-filter 7f80
To enable scrambling of the ATM cell payload for the DS-3 PLIM, use the ds3 scrambling global configuration command. To disable scrambling of the ATM cell payload for the DS-3 PLIM, use the no form of this command.
This command has no keywords and arguments.
DS-3 scrambling is disabled.
Global configuration
This command is supported on Cisco 7000, Cisco 4500, and Cisco 4700 routers.
To map a protocol address to a given VPI and VCI, use the dxi map interface configuration command. Use the no form of this command to remove the mapping for that protocol and protocol address.
| protocol | The bridging or protocol keyword: apollo, appletalk, bridge, clns, decnet, ip, novell, vines, or xns. |
| protocol-address | Protocol-specific address. |
| vpi | Virtual path identifier in the range 0 to 15. |
| vci | Virtual circuit identifier in the range 0 to 63. |
| broadcast | (Optional) Broadcasts should be forwarded to this address. |
No map definition is established.
Interface configuration
This command is used in configurations where the router is intended to communicate with an ATM network through an ATM Data Service Unit (ADSU). Given the circuit identifier parameters (VPI and VCI) for the ATM permanent virtual circuit, the router computes and uses the DXI frame address (DFA) that is used for communication between the router and the ADSU.
The dxi map command can be used only on a serial interface or HSSI configured for ATM-DXI encapsulation.
In the following example, all IP packets intended for the host with IP address 172.21.170.49 are converted into ATM cells identified with a VPI of 2 (binary 0000 0010) and a VCI of 46 (binary 0000 0000 0010 1110) by the ADSU.
interface serial 0 dxi map ip 172.21.170.49 2 46 broadcast
Using the mapping defined in Annex A of the ATM DXI Specification, the router will use the VPI and VCI information in this example to compute a DFA of 558 (binary 1000101110). The ADSU will use DFA of the incoming frame to extract the VPI and VCI information when formulating ATM cells.
A dagger (†) indicates that the command is documented in another chapter.
dxi pvc
encapsulation atm-dxi
interface serial †
Use the dxi pvc interface configuration command to configure multiprotocol or single protocol ATM-DXI encapsulation. The no form of this command disables multiprotocol ATM-DXI encapsulation.
| vpi | ATM network virtual path identifier (VPI) of this PVC, in the range from 0 through 255. The VPI is an 8-bit field in the header of the ATM cell. The VPI value is unique only on a single interface, not throughout the ATM network (it has local significance only). Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. |
|---|---|
| vci | ATM network virtual channel identifier (VCI) of this PVC, in the range of 0 through 65535. The VCI is a 16-bit field in the header of the ATM cell. The VCI value is unique only on a single interface, not throughout the ATM network (it has local significance only). Both vpi and vci cannot be specified as 0; if one is 0, the other cannot be 0. |
| snap | (Optional) LLC/SNAP encapsulation based on the protocol used in the packet. This keyword defines a PVC that can carry multiple network protocols. This is the default. |
| nlpid | (Optional) RFC 1294/1490 encapsulation. This option is provided for backward compatibility with the default encapsulation in earlier versions of the Cisco IOS. |
| mux | (Optional) MUX encapsulation; the carried protocol is defined by the dxi map command when the PVC is set up. This keyword defines a PVC that carries only one network protocol. |
LLC/SNAP encapsulation.
Interface configuration
This command can be used only on a serial interface or HSSI that is configured with ATM-DXI encapsulation.
Select the nlpid option if software earlier than Release 10.3 was loaded previously on this router and the router was configured for the default encapsulation, which was nlpid in pre-10.3 releases.
The following example configures ATM-DXI MUX encapsulation on serial interface 1. The PVC identified by a VPI of 10 and a VCI of 10 will carry a single protocol. Then the protocol to be carried on this PVC is defined by the dxi map command.
interface serial 1 dxi pvc 10 10 mux dxi map ip 172.21.176.45 10 10 broadcast
The following example configures ATM-DXI NLPID encapsulation on serial interface 1. The PVC identified by a VPI of 11 and a VCI of 12 can carry multiprotocol traffic that is encapsulated with a header described in RFC 1294/1490.
interface serial 0 dxi pvc 11 12 nlpid
dxi map
encapsulation atm-dxi
show dxi pvc
To place OC-3c, DS3, or E3 interfaces on the Cisco 7000 series AIP into loopback mode or to place OC-3c interfaces on the Cisco 4500 NPM into loopback mode, use the following form of loopback interface configuration command. Use the no form of this command to remove the loopback.,
To place E3 or DS3 interfaces on the Cisco 4500 NPM into loopback mode, use the following form of the loopback interface configuration command. Use the no form of this command to remove the loopback.,
| diagnostic | Place the interface into internal loopback at the PLIM. |
| line | Place the interface into external loopback at the line. This is the default. |
| payload | Place the interface into external loopback at the payload level. |
| cell | Place the interface into external loopback at cell level |
line; packets loop from the ATM interface back to the ATM network.
Interface configuration
This command is useful for testing because it loops all packets from the ATM interface (AIP or NPM) back to the interface as well as directing the packets to the network.
The following example loops all packets back to the AIP or NPM:
loopback diagnostic
To enter map-class configuration mode to define quality of service (QOS) parameters that are associated with a static map for an SVC, use the map-class global configuration command. The no form of this command deletes this class.
| encapsulation | Encapsulation type. One of the following: atm, dialer, frame-relay, smds, or x25. |
| class-name | User-assigned name of the QOS parameters table. |
No QOS parameters are defined.
Global configuration
If the map class identified by class-name does not already exist, the router creates a new one. In either case, this command specifies the map class to which subsequent encapsulation-specific commands apply. Configuration of a map class is allowed only if the subsystem corresponding to the encapsulation is linked.
It is up to the media-specific routing that uses a static map to ensure that the referenced class exists if parameters are required.
The following example establishes QOS parameters for map-class atmclass1 and map-class atmclass2:
map-list atmlist ip 172.21.170.21 atm-vc 12 ip 172.21.180.121 atm-nsap 12.3456.7890.abcd.0000.00 broadcast ip 172.21.190.221 atm-vc 88 class atmclass1 decnet 10.23 atm-vc 33 class atmclass2 broadcast map-class atm atmclass1 atm forward-peak-cell-rate-clp0 8000 atm backward-peak-cell-rate-clp0 8000 map-class atm atmclass2 atm forward-peak-cell-rate-clp1 7000 atm backward-peak-cell-rate-clp1 7000 atm backward-sustainable-cell-rate-clp0 800 interface atm 2/0 map-group atmlist
atm backward-peak-cell-rate-clp0
atm backward-peak-cell-rate-clp1
atm backward-max-burst-size-clp0
atm backward-max-burst-size-clp1
atm backward-sustainable-cell-rate-clp0
atm backward-sustainable-cell-rate-clp1
atm forward-peak-cell-rate-clp0
atm forward-peak-cell-rate-clp1
atm forward-max-burst-size-clp0
atm forward-max-burst-size-clp1
atm forward-sustainable-cell-rate-clp0
atm forward-sustainable-cell-rate-clp1
To associate an ATM map list to an interface or subinterface for either a PVC or SVC, use the map-group interface configuration command. The no form of this command removes the reference to the map list.
| name | Name of the map list identified by the map-list command. |
No ATM map lists are associated.
Interface configuration
More than one map-group can be configured for an interface.
In the following example, the map list named atm is associated with the ATM interface:
interface atm 2/0 map-group atm
map-list
To define an ATM map statement for either a PVC or SVC, use the map-list global configuration command. The no form of this command deletes this list and all associated map statements.
| name | Name of the map list. |
No map statements are defined.
Global configuration
To allow the router to propagate routing updates and ARP requests, a static map that maps the protocol address and the ATM address of the next-hop ATM station must be configured. The router supports a mapping scheme that identifies the ATM address of remote hosts/routers. This address can be specified either as a virtual circuit descriptor (vcd) for a PVC or an NSAP address for an SVC.
The map-list command specifies the map list to which the subsequent map-list configuration commands apply. These map-list configuration commands identify destination addresses. One map list can contain multiple map entries. A map list can be referenced by more than one interface or subinterface.
In the following example for a PVC, a map list named atm is followed by two map statements for protocol addresses being mapped:
map-list atm ip 172.21.168.112 atm-vc 1 broadcast decnet 10.2 atm-vc 2 broadcast
In the following example for an SVC, a map list named atm includes two map statements for protocol addresses being mapped:
map-list atm ip 172.21.97.165 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.13 ip 172.21.97.166 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
atm-nsap
atm-vc
map-group
To display the ATM ARP server's information about one specific interface or all interfaces, use the show atm arp-server user EXEC command.
| atm slot/port | (Optional) ATM slot and port numbers on the Cisco 7000 series routers. |
| atm number | (Optional) ATM network processor module number on the Cisco 4000 series routers. |
| .subinterface-number | (Optional) Subinterface number. |
User EXEC
The following displays output when no interface is specified:
merryvale#show atm arp-server
Note that a '*' next to an IP address indicates an active call
IP Address TTL ATM Address
ATM1/0:
* 4.4.4.2 19:50 ac15336602000000000000000000000000000000
* 4.4.4.6 19:50 ac15336606000000000000000000000000000000
* 4.4.4.15 19:14 ac15336615000000000000000000000000000000
ATM1/0.23:
* 10.0.0.2 19:50 ac15336602000000000000000000000000000023
* 10.0.0.6 19:50 ac15336606000000000000000000000000000023
The following displays output when a slot andport are specified on the Cisco 7000:
merryvale#show atm arp-server atm1/0
Note that a '*' next to an IP address indicates an active call
IP Address TTL ATM Address
* 4.4.4.2 19:00 ac15336602000000000000000000000000000000
* 4.4.4.6 19:00 ac15336606000000000000000000000000000000
* 4.4.4.15 19:14 ac15336615000000000000000000000000000000
atm arp-server
To display ATM-specific information about an ATM interface, use the show atm interface atm privileged EXEC command.
| slot/port | Slot number and port number of the AIP. |
| number | NPM number. |
Privileged EXEC
The following is sample output from the show atm interface atm command to display statistics on slot 4, port 0:
Router# show atm interface atm 4/0 ATM interface ATM4/0: AAL enabled: AAL5, Maximum VCs: 1024, Current VCs: 6 Tx buffers 256, Rx buffers 256, Exception Queue: 32, Raw Queue: 32 VP Filter: 0x7B, VCIs per VPI: 1024, Max Datagram Size:4496, MIDs/VC:16 PLIM Type:4B5B - 100Mbps, No Framing, TX clocking: LINE 4897 input, 2900 output, 0 IN fast, 0 OUT fast Rate-Queue 1 set to 100Mbps, reg=0x4EA DYNAMIC, 1 VCCs ATM4/0.1:AAL3/4-SMDS address c111.1111.1111 Multicast e222.2222.222 Config. is ACTIVE
Table 7-1 describes the fields shown in the display.
Table 7-1 Show ATM Interface ATM Field Descriptions
| Field | Description |
|---|---|
| ATM interface | Slot/port number of the interface. |
| AAL enabled | Type of AAL. If both AAL5 and AAL3/4 are enabled on the interface, the output will include both AAL5 and AAL3/4. |
| Maximum VCs | Maximum number of virtual circuits this interface can support. |
| Current VCs | Number of active virtual circuits. |
| Tx buffers, Rx buffers | Number of buffers configured with the atm txbuff or atm rxbuff command, respectively. |
| Exception Queue | Number of buffers configured with the atm exception-queue command. |
| Raw Queue | Queue size configured with the atm rawq-size command. |
| VP Filter | Hexadecimal value of the VP filter as configured by the atm vpfilter command. |
| VCIs per VPI | Maximum number of VCIs to support per VPI, as configured by the atm vc-per-vp command. |
| Max Datagram Size | The configured maximum number of bytes in the largest datagram. |
| MIDs/VC | The configured maximum number of message identifiers allowed per virtual circuit on this interface. |
| PLIM Type | Physical Layer Interface Module (PLIM) type (E3, 4B/5B, or SONET). |
| Framing | For E3, this might be G.804; otherwise, no framing. |
| TX clocking | Clocking on the router. For E3 or SONET, this might be INTERNAL, meaning the AIP generates the clock. Otherwise, LINE indicates that the ATM switch provides the clocking. |
| input | Number of packets received and process switched. |
| output | Number of packets sent from process switch. |
| IN fast | Number of input packets fast-switched. |
| OUT fast | Number of output packets fast-switched. |
| Rate-Queue | List of configured rate queues. |
| reg= | Actual register value passed to the AIP to define a specific rate queue. |
| DYNAMIC | Indicates that the rate queue is dynamic and was created automatically by the software. Dynamic rate queues are created when an atm pvc command specifies a peak/average rate that does not match any user configured rate queue. The value PERMANENT indicates that the rate queue was user-configured. |
| VCCs | Number of virtual channel connections (VCCs) dynamically attached to this rate queue. |
| ATM4/0.1 | Indicates that the subinterface supports ATM adaptation layer AAL3/4 and displays the SMDS E.164 unicast address and the SMDS E.164 multicast address assigned to the subinterface. |
| Config. is | ACTIVE or VALID in n SECONDS. ACTIVE indicates that the current AIP configuration has been loaded into the AIP and is being used. There is a 5-second window when a user changes a configuration and the configuration is sent to the AIP. |
atm pvc
To display the list of all configured ATM static maps to remote hosts on an ATM network, use the show atm map privileged EXEC command.
This command has no arguments or keywords.
Privileged EXEC
The following is sample output from the show atm map command:
Router# show atm map Map list atm : vines 3004B310:0001 maps to VC 4, broadcast ip 172.21.168.110 maps to VC 1, broadcast clns 47.0004.0001.0000.0c00.6e26.00 maps to VC 6, broadcast appletalk 10.1 maps to VC 7, broadcast decnet 10.1 maps to VC 2, broadcast
Table 7-2 describes the fields shown in the display.
The following is sample output from the show atm map command for a multipoint connection.
stirling#sh atm map Map list atm_pri : PERMANENT ip 4.4.4.4 maps to NSAP CD.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, multipoint connection up, VC 6 ip 4.4.4.6 maps to NSAP DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, connection up, VC 15, multipoint connection up, VC 6 Map list atm_ipx : PERMANENT ipx 1004.dddd.dddd.dddd maps to NSAP DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, multipoint connection up, VC 8 ipx 1004.cccc.cccc.cccc maps to NSAP CD.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, multipoint connection up, VC 8 Map list atm_apple : PERMANENT appletalk 62000.5 maps to NSAP CD.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, multipoint connection up, VC 4 appletalk 62000.6 maps to NSAP DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12, broadcast, aal5mux, multipoint connection up, VC 4
Table 7-2 Show ATM Map Field Descriptions
| Field | Description |
|---|---|
| Map list | Name of map list. |
| PERMANENT | This map entry was entered from configuration; it was not entered automatically by a process. |
| protocol address maps to VC xorprotocol address maps to NSAP... | Name of protocol, the protocol address, and the VCD or NSAP that the address is mapped to. |
| broadcast | Indicates pseudobroadcasting. |
| aal5mux | Indicates the encapsulation used, a multipoint or point-to-point virtual circuit, and the number of the virtual circuit. |
| multipoint connection up | Indicates that this is a multipoint virtual circuit. |
| VC 6 | Number of the virtual circuit. |
| Connection up | Indicates a point-to-point virtual circuit. |
atm pvc
map-list
To display current, global ATM traffic information to and from all ATM networks connected to the router, use the show atm traffic privileged EXEC command.
This command has no arguments or keywords.
Privileged EXEC
The following is sample output from the show atm traffic command:
Router# show atm traffic 4915 Input packets 0 Output packets 2913 Broadcast packets 0 Packets for non-existent VC
Table 7-3 describes the fields shown in the display.
Table 7-3 Show ATM Traffic Field Descriptions
| Field | Description |
|---|---|
| Input packets | Total packets input. |
| Output packets | Total packets output (nonbroadcast). |
| Broadcast packets | Total broadcast packets output. |
| Packets for nonexistent VC | Packets sent to virtual circuits not configured. |
atm pvc
To display all active ATM virtual circuits (PVCs and SVCs) and traffic information, use the show atm vc privileged EXEC command.
| vcd | (Optional) Specifies which virtual circuit to display information about. |
Privileged EXEC
If no vcd is specified, the command displays information for all PVCs and SVCs. The output is in summary form (one line per virtual circuit).
The following is sample output from the show atm vc command when no vcd is specified, displaying statistics for all virtual circuits:
Router# show atm vc Intfc. VCD VPI VCI Type AAL/Encaps Peak Avg. Burst ATM4/0.1 1 1 1 PVC AAL3/4-SMDS 0 0 0 ATM4/0 2 2 2 PVC AAL5-SNAP 0 0 0 ATM4/0 3 3 3 PVC AAL5-SNAP 0 0 0 ATM4/0 4 4 4 PVC AAL5-MUX 0 0 0 ATM4/0 6 6 6 PVC AAL5-SNAP 0 0 0 ATM4/0 7 7 7 PVC AAL5-SNAP 0 0 0
The following is sample output from the show atm vc command when a vcd is specified, displaying statistics for that virtual circuit only:
Router# show atm vc 8 ATM4/0: VCD: 8, VPI: 8, VCI: 8, etype:0x0, AAL5 - LLC/SNAP, Flags: 0x30 PeakRate: 0, Average Rate: 0, Burst: 0 *32cells, VCmode: 0xE000 InPkts: 181061, OutPkts: 570499, InBytes: 757314267, OutBytes: 2137187609 InPRoc: 181011, OutPRoc: 10, Broadcasts: 570459 InFast: 39, OutFast: 36, InAS: 11, OutAS: 6
The following is sample output from the show atm vc command when a vcd is specified, AAL3/4 is enabled, an ATM SMDS subinterface has been defined, and a range of message identifier numbers (MIDs) has been assigned to the PVC:
Router# show atm vc 1 ATM4/0.1: VCD: 1, VPI: 0, VCI: 1, etype:0x1, AAL3/4 - SMDS, Flags: 0x35 PeakRate: 0, Average Rate: 0, Burst: 0 *32cells, VCmode: 0xE200 MID start: 1, MID end: 16 InPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0 InPRoc: 0, OutPRoc: 0, Broadcasts: 0 InFast: 0, OutFast: 0, InAS: 0, OutAS: 0
The following is sample output from the show atm vc command when generation of OAM F5 loopback cells has been enabled:
marley#show atm vc 7 ATM4/0: VCD: 7, VPI: 7, VCI: 7, etype:0x0, AAL5 - LLC/SNAP, Flags: 0x30 PeakRate: 0, Average Rate: 0, Burst: 0 *32cells, VCmode: 0xE000 OAM frequency: 10, InARP DISABLED InPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0 InPRoc: 0, OutPRoc:0, Broadcast:0 InFast:0, OutFast:0, InAS:0, OutAS:0 OAM F5 cells sent: 1, OAM cells received: 0
The following is sample output from the show atm vc command for an incoming multipoint virtual circuit:
stirling#sh atm vc 3 ATM2/0: VCD: 3, VPI: 0, VCI: 33, etype:0x809B, AAL5 - MUX, Flags: 0x53 PeakRate: 0, Average Rate: 0, Burst: 0, VCmode: 0xE000 OAM DISABLED, InARP DISABLED InPkts: 6646, OutPkts: 0, InBytes: 153078, OutBytes: 0 InPRoc: 6646, OutPRoc: 0, Broadcasts: 0 InFast: 0, OutFast: 0, InAS: 0, OutAS: 0 interface = ATM2/0, call remotely initiated, call reference = 18082 vcnum = 3, vpi = 0, vci = 33, state = Active aal5mux vc, multipoint call Retry count: Current = 0, Max = 10 timer currently inactive, timer value = never Root Atm Nsap address: DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
The following is sample output from the show atm vc command for an outgoing multipoint virtual circuit:
stirling#sh atm v 6 ATM2/0: VCD: 6, VPI: 0, VCI: 35, etype:0x800, AAL5 - MUX, Flags: 0x53 PeakRate: 0, Average Rate: 0, Burst: 0, VCmode: 0xE000 OAM DISABLED, InARP DISABLED InPkts: 0, OutPkts: 818, InBytes: 0, OutBytes: 37628 InPRoc: 0, OutPRoc: 0, Broadcasts: 818 InFast: 0, OutFast: 0, InAS: 0, OutAS: 0 interface = ATM2/0, call locally initiated, call reference = 3 vcnum = 6, vpi = 0, vci = 35, state = Active aal5mux vc, multipoint call Retry count: Current = 0, Max = 10 timer currently inactive, timer value = never Leaf Atm Nsap address: DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 Leaf Atm Nsap address: CD.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
Table 7-4 describes the fields shown in the displays.
Table 7-4 Show ATM VC Field Descriptions
| Field | Description |
|---|---|
| Intfc. | Interface slot/port. |
| VCD | Virtual circuit descriptor (virtual circuit number). |
| VPI | Virtual path identifier. |
| VCI | Virtual channel identifier. |
| Type | Type of virtual circuit, either PVC or SVC. |
| AAL/Encaps | Type of ATM adaptation layer (AAL) and encapsulation. |
| etype | Ether type. |
| Flags | Bit mask describing virtual circuit information. The flag values are summed to result in the displayed value. 0x40 SVC 0x20 PVC 0x10 ACTIVE 0x1 AAL5SNAP 0x2 AAL5NLPID 0x3 AAL5FRNLPID 0x4 AAL5MUX 0x5 AAL3/4-SMDS 0x6 QSAAL |
| PeakRate | Number of packets transmitted at the peak rate. |
| Average Rate | Number of packets transmitted at the average rate. |
| Burst | Value that, when multiplied by 32, equals the maximum number of ATM cells the virtual circuit can transmit at the peak rate of the virtual circuit. |
| Vcmode | AIP-specific register describing the usage of the virtual circuit. Contains values such as rate queue, peak rate, and AAL mode, which are also displayed in other fields. |
| InPkts | Total number of packets received on this virtual circuit. This number includes all silicon-switched, fast-switched, autonomous-switched, and process-switched packets. |
| OutPkts | Total number of packets sent on this virtual circuit. This number includes all silicon-switched, fast-switched, autonomous-switched, and process-switched packets. |
| InBytes | Total number of bytes received on this virtual circuit. This number includes all silicon-switched, fast-switched, autonomous-switched, and process-switched bytes. |
| OutBytes | Total number of bytes sent on this virtual circuit. This number includes all silicon-switched, fast-switched, autonomous-switched, and process-switched bytes. |
| InPRoc | Number of process-switched input packets. |
| OutPRoc | Number of process-switched output packets. |
| Broadcast | Number of process-switched broadcast packets. |
| InFast | Number of fast-switched input packets. |
| OutFast | Number of fast-switched output packets. |
| InAS | Number of autonomous-switched or silicon-switched input packets. |
| OutAS | Number of autonomous-switched or silicon-switched output packets. |
| OAM frequency: 10 | OAM cells are sent every 10 seconds. |
| OAM F5 cells sent: 1 | Number of OAM cells sent on this virtual circuit. |
| OAM cells received: 0 | Number of OAM cells received on this virtual circuit. |
atm pvc
To display all the protocol addresses mapped to a serial interface, use the show dxi map EXEC command.
EXEC
The following is sample output from the show dxi map command. It displays output for several previously defined ATM-DXI maps that defined Apollo, IP, DECnet, CLNS, and AppleTalk protocol addresses, various encapsulations, and broadcast traffic.
Router# show dxi map Serial0 (administratively down): ipx 123.0000.1234.1234 DFA 69(0x45,0x1050), static, vpi = 4, vci = 5, encapsulation: SNAP Serial0 (administratively down): appletalk 2000.5 DFA 52(0x34,0xC40), static, vpi = 3, vci = 4, encapsulation: NLPID Serial0 (administratively down): ip 172.21.177.1 DFA 35(0x23,0x830), static, broadcast, vpi = 2, vci = 3, encapsulation: VC based MUX, Linktype IP
Table 7-5 explains significant fields shown in the display.
Table 7-5 Show DXI Map Field Descriptions
| Field | Description |
|---|---|
| DFA | DXI Frame Address, similar to a DLCI for Frame Relay. The DFA is shown in decimal, hexadecimal, and in DXI header format. The router computes this address value from the VPI and VCI values. |
| encapsulation: | Encapsulation type selected by the dxi pvc command. Displayed values can be SNAP, NLPID, or VC based MUX. |
| Linktype | Value used only with MUX encapsulation and therefore with only a single network protocol defined for the PVC. Maps configured on a PVC with MUX encapsulation must have the same link type. |
To display the PVC statistics for a serial interface, use the show dxi pvc EXEC command.
EXEC
The following is sample output from the show dxi pvc command. It displays output for ATM-DXI PVCs previously defined for serial interface 0.
Router# show dxi pvc
PVC Statistics for interface Serial0 (ATM DXI)
DFA = 17, VPI = 1, VCI = 1, PVC STATUS = STATIC, INTERFACE = Serial0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 0
DFA = 34, VPI = 2, VCI = 2, PVC STATUS = STATIC, INTERFACE = Serial0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 0
DFA = 35, VPI = 2, VCI = 3, PVC STATUS = STATIC, INTERFACE = Serial0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 0
Table 7-6 describes significant fields shown in the display.
Table 7-6 Show DXI PVC Field Descriptions
| Field | Description |
|---|---|
| DFA | DXI Frame Address, similar to a DLCI for Frame Relay. The DFA is shown in decimal, hexadecimal, and in DXI header format. The router computes this address value from the VPI and VCI values. |
| PVC STATUS = STATIC | Only static maps are supported. Maps are not created dynamically. |
| input pkts | Number of packets received. |
| output pkts | Number of packets transmitted. |
| in bytes | Number of bytes in all packets received. |
| out bytes | Number of bytes in all packets transmitted. |
| dropped pkts | Should display a zero (0) value. A nonzero value indicates a configuration problem, specifically that a PVC does not exist. |
To show SSCOP details for all ATM interfaces, use the show sscop privileged EXEC command.
This command has no arguments or keywords.
Privileged EXEC
The following is sample output from the show sscop command:
Router# show sscop
SSCOP details for interface ATM4/0
Current State = Data Transfer Ready
Send Sequence Number: Current = 2, Maximum = 9
Send Sequence Number Acked = 3
Rcv Sequence Number: Lower Edge = 2, Upper Edge = 2, Max = 9
Poll Sequence Number = 1876, Poll Ack Sequence Number = 2
Vt(Pd) = 0
Connection Control: timer = 1000
Timer currently Inactive
Keep Alive Timer = 30000
Current Retry Count = 0, Maximum Retry Count = 10
Statistics -
Pdu's Sent = 0, Pdu's Received = 0, Pdu's Ignored = 0
Begin = 0/1, Begin Ack = 1/0, Begin Reject = 0/0
End = 0/0, End Ack = 0/0
Resync = 0/0, Resync Ack = 0/0
Sequenced Data = 2/0, Sequenced Poll Data = 0/0
Poll = 1591/1876, Stat = 0/1591, Unsolicited Stat = 0/0
Unassured Data = 0/0, Mgmt Data = 0/0, Unknown Pdu's = 0
Table 7-7 describes the fields shown in the display. Interpreting this output requires a good understanding of the SSCOP; it is usually displayed by our technicians to help diagnose network problems.
Table 7-7 Show SSCOP Field Descriptions
| Field | Description |
|---|---|
| SSCOP details for interface | Interface slot and port. |
| Current State | SSCOP state for the interface. |
| Send Sequence Number | Current and maximum send sequence number. |
| Send Sequence Number Acked | Sequence number of packets already acknowledged. |
| Rcv Sequence Number | Sequence number of packets received. |
| Poll Sequence Number | Current poll sequence number. |
| Poll Ack Sequence Number | Poll sequence number already acknowledged. |
| Vt(Pd) | Number of Sd frames sent which triggers a sending of a Poll frame. |
| Connection Control | Timer used for establishing and terminating SSCOP. |
| Keep Alive Timer | Timer used to send keepalives on an idle link. |
| Current Retry Count | Current count of the retry counter. |
| Maximum Retry Count | Maximum value the retry counter can take. |
| Pdu's Sent | Total number of SSCOP frames sent. |
| Pdu's Received | Total number of SSCOP frames received. |
| Pdu's Ignored | Number of invalid SSCOP frames ignored. |
| Begin | Number of Begin frames sent/received. |
| Begin Ack | Number of Begin Ack frames sent/received. |
| Begin Reject | Number of Begin Reject frames sent/received. |
| End | Number of End frames sent/received. |
| End Ack | Number of End Ack frames sent/received. |
| Resync | Number of Resync frames sent/received. |
| Resync Ack | Number of Resync Ack frames sent/received. |
| Sequenced Data | Number of Sequenced Data frames sent/received. |
| Sequenced Poll Data | Number of Sequenced Poll Data frames sent/received. |
| Poll | Number of Poll frames sent/received. |
| Stat | Number of Stat frames sent/received. |
| Unsolicited Stat | Number of Unsolicited Stat frames sent/received. |
| Unassured Data | Number of Unassured Data frames sent/received. |
| Mgmt Data | Number of Mgmt Data frames sent/received. |
| Unknown Pdu's | Number of Unknown Pdu's frames sent/received. |
To change the connection control timer, use the sscop cc-timer interface configuration command. The no form of this command restores the default value.
| seconds | Number of seconds between Begin messages. Default is 10 seconds. |
10 seconds
Interface configuration
The connection control timer determines the time between transmission of BGN, END, or RS PDUs as long as an acknowledgment has not been received.
In the following example, the connection control timer is set to 15 seconds:
sscop cc-timer 15
sscop max-cc
To change the keepalive timer, use the sscop keepalive-timer interface configuration command. The no form of this command restores the default value.
| seconds | Number of seconds the router waits between transmission of POLL PDUs when no SD or SDP PDUs are queued for transmission or are outstanding pending acknowledgments. |
30 seconds
Interface configuration
In the following example, the keepalive timer is set to 15 seconds:
sscop keepalive-timer 15
To change the retry count of connection control, use the sscop max-cc interface configuration command. The no form of this command restores the default value.
| retries | Number of times that SSCOP will retry to transmit BGN, END, or RS PDUs as long as an acknowledgment has not been received. Valid range is 1 to 6000. |
10 retries
Interface configuration
In the following example, the retry count of the connection control is set to 20:
sscop max-cc 20
sscop cc-timer
To change the poll timer, use the sscop poll-timer interface configuration command. The no form of this command restores the default value.
| seconds | Number of seconds the router waits between transmission of POLL PDUs. |
10 seconds
Interface configuration
The poll timer controls the maximum time between transmission of POLL PDUs when SD or SDP PDUs are queued for transmission or are outstanding pending acknowledgments.
In the following example, the poll timer is set to 15 seconds:
sscop poll-timer 15
To change the receiver window, use the sscop rcv-window interface configuration command. The no form of this command restores the default value.
| packets | Number of packets the interface can receive before it must send an acknowledgment to the ATM switch. Valid range is 1 to 6000. |
7 packets
Interface configuration
In the following example, the receiver's window is set to 10 packets:
sscop rcv-window 10
To change the transmitter window, use the sscop send-window interface configuration command. The no form of this command restores the default value.
| packets | Number of packets the interface can send before it must receive an acknowledgment from the ATM switch. Valid range is 1 to 6000. |
7 packets
Interface configuration
In the following example, the transmitter's window is set to 10 packets:
sscop send-window 10
|
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