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This chapter describes procedures for configuring Cisco 1600 series routers, and contains the following sections:
Software Configuration Quick Reference Cards
The Cisco 1600 series routers are shipped with quick reference cards that contain detailed configuration examples based on both ClickStart software, a WWW browser-based configuration tool, and on Cisco Internetwork Operating System (Cisco IOS) software. Refer to these cards for start-to-finish configuration examples.
Configuring the Router with a PC
If you are configuring the router using a PC (not a dumb terminal), you need a type of communications software called terminal emulation software. This software enables the PC to send commands to the router. Table 5-1 lists some common names of this type of software, based on the type of PC you are using.
Table 5-1 : Terminal Emulation Software
| PC Operating System | Software |
|---|---|
| Windows 3.1 | Terminal (included with Windows software) |
| Windows 95 | HyperTerm (included with Windows software) |
| Macintosh | ProComm, VersaTerm (supplied separately) |
Terminal emulation software allows you to change settings based on the type of device that is connected to the PC, in this case a router. To enable your PC to communicate to the router, configure the software settings to the following:
You can now configure the router using the PC.
If you are using one of the router models with an ISDN BRI interface, or you have installed an ISDN BRI WAN interface card in your router, you must order an ISDN BRI line to operate with your router.
If you have not ordered your ISDN BRI line, refer to the section "Ordering and Configuring an ISDN BRI Line" in the chapter "Preparing to Install the Router" for general guidelines about ordering the line.
The router runs Cisco Internetwork Operating System (Cisco IOS) software. Using the software's many features is easier if you have more information at hand. We recommend the following publications:
These publications are available in the following forms:
You configure Cisco 1600 series routers using the Cisco command interpreter, called the EXEC. You must log into the router before you can enter an EXEC command. For security purposes, the EXEC has two levels of access to commands, user EXEC mode and privileged EXEC mode. The commands available in user EXEC mode are a subset of those available in privileged EXEC mode.
Using the Enable Secret and the Enable Passwords
Because many privileged-level EXEC commands are used to set operating parameters, you should password-protect these commands to prevent unauthorized use.
You use two commands to do this:
You must enter an enable secret password to gain access to privileged-level commands.
For maximum security, the passwords should be different. If you enter the same password for both during the setup process, the router accepts the passwords, but warns you that they should be different.
An enable secret password can contain from 1 to 25 uppercase and lowercase alphanumeric characters. An enable password can contain any number of uppercase and lowercase alphanumeric characters. In both cases, a number cannot be the first character. Spaces are also valid password characters; for example, "two words" is a valid password. Leading spaces are ignored; trailing spaces are recognized.
If you lose or forget your enable password, see the section "Recovering a Lost Enable Password" in the appendix "Troubleshooting."
When you install a new WAN interface card, or if you want to change the configuration of an existing interface, you must enter configuration mode to configure the interfaces. If you replace a module that was already configured, the router recognizes the new module interfaces and brings them up in the existing configuration.
Before you configure an interface, have the following information available:
You can configure the router according to any of the following procedures:
Follow the procedure that best fits the needs of your network configuration.
Configuring the Router Using Configuration Mode
You can configure the router manually if you prefer not to use AutoInstall or the setup facility. Take the following steps to configure the router manually:
The prompt changes to the privileged EXEC (enable) prompt (Router#):
To see the current operating configuration, including any changes you have just made, enter the command show running-config at the enable prompt:
To see the configuration in nonvolatile random-access memory (NVRAM), enter the command show startup-configuration at the enable prompt.
The results of the show running-config and show startup-config commands differ from each other if you have made changes to the configuration, but have not yet written them to NVRAM.
To write your changes to NVRAM, making them permanent, enter the command copy running-config startup-config at the enable prompt:
The router is now configured to boot with the configuration you entered.
Configuring the Router Using AutoInstall
The AutoInstall process is designed to configure the router automatically after connection to your WAN. In order for AutoInstall to work properly, a Transmission Control Protocol/Internet Protocol (TCP/IP) host on your network must provide the required configuration files. The TCP/IP host can reside anywhere on the network as long as the following two conditions are satisfied:
This functionality is coordinated by your system administrator at the site where the TCP/IP host is located. You should not attempt to use AutoInstall unless the required files have been installed on the TCP/IP host.
Take the following steps to prepare your router for the AutoInstall process:
Configuring the Router Manually Using the Setup Facility
The router attempts to run AutoInstall whenever you start it if the WAN connection is connected on both ends and the router does not have a configuration stored in NVRAM. It can take several minutes for the router to determine that configuration files are not set up on a remote TCP/IP host. After the router has determined that AutoInstall is not configured, it defaults to the setup facility.
If you do not plan to use AutoInstall, do not connect the router's WAN cable to the WAN interface. The router will then not attempt to run the AutoInstall process. It will boot instead from Flash memory and the setup facility will start immediately.
When you first start the setup facility, you must configure the global parameters, which control systemwide settings.
Take the following steps to enter global parameters:
This completes the procedure for configuring global parameters. To configure parameters for a LAN or WAN interface on a port module, see the configuration note for the port module.
Checking and Saving Your Settings
To check the settings you have configured, enter the command show running-config at the enable (Router#) prompt:
To store the configuration, enter the command copy running-config startup-config at the enable (Router#) prompt:
This command saves the configuration settings that the setup facility created. If you fail to do this, your new configuration will be lost the next time you reload the router.
When you have finished configuring the network interfaces, use the show interface command to check network interface statistics. Options to the show interface command include interface---the type of interface (for example, serial)---and unit---the unit number of the interface.
The following example shows the output of show interface serial 0:
To display the current internal status of an interface module, use the show controller command with the interface and unit options.
The following example shows the output of the show controller serial 0 command from a Cisco 1601:
Note that in the preceding example, the cable type is shown as data terminal equipment (DTE) V.24 (RS-232) serial cable. If the cable is data communications equipment (DCE), the output of the show controller command displays the clock rate.
For complete command descriptions and instructions, refer to the Cisco IOS Configuration Guide and the Cisco IOS Command Reference publications. For in-depth WAN configuration description and instructions, refer to the Wide-Area Networking Configuration Guide publication.
Copyright 1988-1996 © Cisco Systems Inc.
Would you like to enter the initial dialog? [yes]:
no
Router>
enable
Router#
Router#
config terminal
Router# show running-config
Router# show startup-config
Router# copy running-config startup-config
********
Router#
copy running-config startup-config
Notice: NVRAM invalid, possibly due to write erase.
--- System Configuration Dialog ---
At any point you may enter a question mark '?' for help.
Refer to the 'Getting Started' Guide for additional help.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets '[]'.
Would you like to enter the initial configuration dialog? [yes]:
First, would you like to see the current interface summary? [yes]:
Any interface listed with OK? value "NO" does not have a valid configuration
Interface IP-Address OK? Method Status Protocol
Ethernet0 unassigned NO not set up down
Serial0 unassigned NO not set down down
Configuring global parameters:
Enter host name [Router]:
router
The enable secret is a one-way cryptographic secret used
instead of the enable password when it exists.
Enter enable secret :
shovel
The enable password is used when there is no enable secret
and when using older software and some boot images.
Enter enable password :
trowel
Enter virtual terminal password:
pail
Configure SNMP Network Management? [no]:
Configure IP? [yes]:
Configure IGRP routing? [yes]:
Your IGRP autonomous system number [1]:
15
Configure IPX? [no]:
yes
Configure AppleTalk? [no]:
yes
Multizone networks? [no]:
yes
Configure LAT? [yes]:
no
Enter ISDN BRI Switch Type [none]:
basic-ni1
Router# show running-config
Router# copy running-config startup-config
Router> show interface serial 0
Serial0 is down, line protocol is down
Hardware is QUICC Serial
Internet address is 5.0.0.1/8
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 10 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=down DTR=up RTS=down CTS=down
Router# show controller serial 0
HQUICC Serial unit 0
idb at 0x2302118, driver data structure at 0x2303E30
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x0
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0000
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:
Config [CICR]=0x00368460, Pending [CIPR]=0x05004400
Mask [CIMR]=0x58000052, In-srv [CISR]=0x00000000
Command register [CR]=0x680
Port A [PADIR]=0x1000, [PAPAR]=0xFEF3
[PAODR]=0x0000, [PADAT]=0xF59E
Port B [PBDIR]=0x00F10E, [PBPAR]=0x0010CE
[PBODR]=0x000000, [PBDAT]=0x0248DD
Port C [PCDIR]=0x0086, [PCPAR]=0x0008
[PCSO]=0x0E30, [PCDAT]=0x0F49, [PCINT]=0x0000
DTE V.24 (RS-232) serial cable attached.
SCC GENERAL PARAMETER RAM (at 0xFF00F00)
Rx BD Base [RBASE]=0x700, Fn Code [RFCR]=0x18
Tx BD Base [TBASE]=0x740, Fn Code [TFCR]=0x18
Max Rx Buff Len [MRBLR]=1524
Rx State [RSTATE]=0x0, BD Ptr [RBPTR]=0x700
Tx State [TSTATE]=0x0, BD Ptr [TBPTR]=0x740
SCC HDLC PARAMETER RAM (at 0xFF00F38)
CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8
Errors: CRC [CRCEC]=0, Aborts [ABTSC]=0, Discards [DISFC]=0
Nonmatch Addr Cntr [NMARC]=0
Retry Count [RETRC]=0
Max Frame Length [MFLR]=1524
Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=0
User-defined Address 0000/0000/0000/0000
User-defined Address Mask 0x0000
buffer size 1524
BRGC1=101B0
BRGC2=0
BRGC3=140FA
BRGC4=0
modem_signal_addr FF01566
MASK: DSR=10000, DTR=20000,RTS=80000.CTS=4000000,DCD=8000000
txbrgc=FF015FC, rxbrgc=FF015FC
BRG [DTE]: rx_sicr_clk=7, tx_sicr_clk=6
BRG [DCE]: rx_sicr_clk=7, tx_sicr_clk=3
CLK SRC: sync=4000, async=4000
RX ring with 8 entries at 0xFF00700, Buffer size 1524
Rxhead = 0xFF00700 (0), Rxp = 0x2303E4C (0)
00 pak=0x2307B24 buf=0x2798EE8 status=9000 pak_size=0
01 pak=0x2307978 buf=0x2798830 status=9000 pak_size=0
02 pak=0x23077CC buf=0x2798178 status=9000 pak_size=0
03 pak=0x2307620 buf=0x2797AC0 status=9000 pak_size=0
04 pak=0x2307474 buf=0x2797408 status=9000 pak_size=0
05 pak=0x23072C8 buf=0x2796D50 status=9000 pak_size=0
06 pak=0x230711C buf=0x2796698 status=9000 pak_size=0
07 pak=0x2306F70 buf=0x2795FE0 status=B000 pak_size=0
TX ring with 4 entries at 0xFF00740, tx_count = 0
tx_head = 0xFF00740 (0), head_txp = 0x2303EA8 (0)
tx_tail = 0xFF00740 (0), tail_txp = 0x2303EA8 (0)
00 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
01 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
02 pak=0x0000000 buf=0x0000000 status=0000 pak_size=0
03 pak=0x0000000 buf=0x0000000 status=2000 pak_size=0
QUICC SCC specific errors:
0 input aborts on receiving flag sequence
0 throttles, 0 enables
0 overruns
0 transmitter underruns
0 transmitter CTS losts
