|
|
This chapter describes how to configure discovery parameters and create a topology map for your ATM network.
To create a topology map for your ATM network, start the discovery process by providing the IP address and community string of an ATM switch in each fabric you want to discover. These IP addresses are called seeds, and the process is called seeding. The discovery process uses the seeds as starting points to find other ATM devices and their connections. It adds the information about the discovered ATM fabrics to the CWSI database and then displays the ATM network in tabular form in the AtmDirector main window. You must provide at least one seed for the discovery process to discover any devices or fabrics.
To find all the ATM devices in your network, you will often need to provide AtmDirector with multiple seeds and community strings. All devices that can be reached from a seed are placed in one ATM fabric. Each fabric is displayed in a separate topology map.
You can display detailed information about any device or link in the topology map, see new devices as they are discovered, and update the topology map.
For further information on creating the network topology map, see Getting Started with CWSI.
AtmDirector discovers the ATM switch network that consists of LightStream 1010 switches. It discovers all ATM switches that support AtoM MIB (RFC 1695) and all ATM hosts that support the Interim Local Management Interface (ILMI) specification. The discovery also queries all physical and logical connections among those switches and hosts.
The following Cisco devices support the AtoM MIB and/or ILMI:
The discovery process requires the supported devices to be preconfigured as follows:
For specific information about setting up any of these features, refer to the documentation for your device.
Polling parameters are configured for status monitoring and for plotting utilization graphs.
To configure polling parameters, follow these steps:
Step 1 Launch AtmDirector from CWSI. See "Launching the AtmDirector Application" in Chapter 1, "Overview."
The AtmDirector main window opens (Figure 1-1).
Step 2 Select Preferences>Options.
The Global Preferences window opens (Figure 3-1).
Step 3 Select Polling to display the SNMP polling parameters.
Step 4 Enter the SNMP timeout value in the Time Out field. The default is five seconds.
Step 5 Enter the number of retries in the Number of Retries field. The default is three.
Step 6 Enter the interval between each polling cycle in the Status Polling Interval field. The default is 30 seconds.
Step 7 Enter the polling interval for the utilization calculations in VC List in the Utilization Polling Interval field. The default is ten seconds.
Step 8 Click OK.
To configure miscellaneous parameters, follow these steps:
Step 1 Launch AtmDirector from CWSI. See "Launching the AtmDirector Application" in Chapter 1, "Overview."
The AtmDirector main window opens (Figure 1-1).
Step 2 Select Preferences>Options.
The Global Preferences window opens (Figure 3-1).
Step 3 Select Miscellaneous to display the miscellaneous parameters.
Step 4 From the Default Fabric scrolling list, select the fabric you want to display by default each time you start AtmDirector.
Step 5 Select the percentage by which you want to increase or decrease the zoom factor in the Zoom Factor field. This is the factor by which zoom in and zoom out will occur when you click these buttons on the topology map. The default is 10 percent.
Step 6 Start or stop the topology debugs by selecting on or off to print debug messages to the log file.
Step 7 Click OK.
The ATM topology information is stored in the CWSI database. You can display a topological map of the ATM switches and hosts in your ATM network. A switch-centric representation shows all the switches of one fabric in one map.
To display topology information about any discovered fabric, follow these steps:
Step 1 Launch AtmDirector from CWSI. See "Launching the AtmDirector Application" in Chapter 1, "Overview."
The AtmDirector main window opens with a list of fabrics and ATM-VLANs in your network (Figure 1-1).
Step 2 Double-click on a fabric to display the topology map for the fabric (Figure 2-2).
Step 3 Double-click on an ATM-VLAN to display the topology for the ATM-VLAN (Figure 2-4).
As ATM switches, links, and hosts in the fabric are discovered, the number of devices discovered since the last update is displayed in the lower right of the window. The discovery process also writes the newly discovered devices to the CWSI database.
After you display a topological view of your network, the discovery process continues to discover new devices and records them in the database. Newly discovered devices are placed on the left corner of the map with links from the appropriate devices. You can place these new devices in desired positions by dragging the device icons.
You can use the topology maps to display any ATM fabric map. Each topology map is displayed in a separate window. The topology map displays all the ATM switches, links, and hosts in a fabric.
Topology maps use the following conventions to display devices, links, and virtual path tunnels:
You can display detailed information about any device or link on the fabric topology map. To do so, follow these steps:
Step 1 From the Fabric topology window, select a link or device using the left mouse button.
Step 2 Select Map>Object>Describe, or select the device or link, press the right mouse button, and select Describe from the popup menu.
The Node Description window (Figure 3-2) or the Link Description window (Figure 3-3) opens.
The Node Description window indicates whether the device is managed or unmanaged. It displays the device name, IP and ATM addresses, and the community string. You can also set or change the write community string by editing the text field and clicking Set.
The Link Description window displays endpoint information such as the device name, card number, subcard number, port number, and interface index number, as well as the link bandwidth. You can also display the utilization of the link by clicking Utilization. The utilization is displayed after the polling interval elapses.
To rename a topology map, follow these steps:
Step 1 From the AtmDirector main window, double-click a fabric name.
The Fabric topology window opens (Figure 2-2).
Step 2 Select Edit>Rename Fabric.
The Rename Fabric window opens.
Step 3 Select the name of the fabric you want to rename.
Step 4 Enter the new name of the map in the New Name field.
Step 5 Click OK.
If a link or a port is enabled between two ATM switches that belong to different ATM fabrics, the discovery process merges the two fabrics and updates the ATM database. When two fabrics merge, AtmDirector creates a new merged map. The name of the new map is added to the Fabric List in the AtmDirector main window and a popup message indicates that the two fabric maps have merged.
The new map name is generated by concatenating the names of the two maps that were merged. For example, if Map1 and Map2 are merged, the new map name is Map1Map2. To rename the new map, select Edit>Rename.
If the two maps are open at the time of the merger, all functionality except print is grayed out and you cannot select the devices and links in the original maps. Use File>Close to close the maps and remove them from the Fabric List.
If the two maps are closed at the time of the merger, they are automatically removed from the Fabric List once they merge.
ATM fabrics are separated when you delete a link between ATM switches in the main CWSI map. When two ATM fabrics separate, AtmDirector creates two new fabric maps and a popup message indicates that the map has been separated. The names of the new maps are added to the Fabric List in the AtmDirector window.
The new map names are generated by appending -1 and -2 to the original map name. For example, if Map1 is separated, the new map names are Map1-1 and Map2-2. To rename the new maps, select Edit>Rename.
If the fabric map is open when that fabric separates, all functionality except print is grayed out and you cannot select the devices and links in the original map. Use File>Close to close the map and remove it from the Fabric List.
If the fabric map is closed when that fabric separates, the map is automatically removed from the Fabric List.
|
|