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Common Questions About CWSI/Campus ManagerNetwork Topology Map Discovery

Document ID: 7989

QuestionsIntroduction

During the installation of CWSI on my machine, a prompt for a "seed device" appears.

What is a seed device, and what is the best choice to make?

Why do I see several icons with red Xs all over the Campus map?

How do I change the discovery parameters after installation of the product?

How do I delete devices from the CWSI Campus topology map?

What additional information do I need to know about Campus Manager 3.0 network

topology map discovery?

Related Information

Introduction

This document answers frequently asked questions (FAQ) about the CWSI application. As CWSI evolves

from CWSI to CWSI Campus to Campus Manager, the network topology map discovery mechanism stays

similar. Therefore, the questions that this document discusses still arise. For example, after you install CWSI,

the discovery cycle can fail to detect network devices. Or, boxes can appear on the Campus map with a "red

X" instead of the correct device icon. The IP address or host name of devices can change after network map

discovery.

This document also describes the new additions on the Campus Manager topology map discovery.

Q. During the installation of CWSI on my machine, a prompt for a "seeddevice" appears. What is a seed device, and what is the best choice tomake?

A. The seed device is the start point from which the CWSI Campus program discovers the

network. From this device, the Campus program discovers network neighbors with the Cisco

Discovery Protocol (CDP) and Integrated Logical Management Interface (ILMI). These are

some guidelines to select the seed device:

The seed device must be a Cisco device.

The seed device should be a core switch and not a router. Although you can specify

a router IP address, you can experience problems with network discovery. For

example, proper discovery can fail to occur for some portions. Good seed devices to

use include the Cisco Catalyst 5000s, Catalyst 5500s, and Catalyst 8510s. If you must

use a router as the seed device, be sure to choose the Jump Router Boundaries option.

Note: See the question How do I change the discovery parameters after installation of

the product? for more information on the Jump Router Boundaries option.

When you select a core switch as the seed device, be sure to specify the IP address

of the Supervisor Engine and not the IP address of the Route Switch Module

(RSM).


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The SNMP setup is incorrect on network devices.

Refer to this document to ensure that you have properly configured SNMP on

network devices:

How to Configure SNMP Community Strings

Q. How do I change the discovery parameters after installation of theproduct?

A. Use the Properties menu to change the operation parameters of the Campus program.

Choose Options > Properties, and click the Discovery tab. The Discovery fields are:

Discovery Interval (sec)

This value determines how often, in seconds, the Campus program does a complete

network discovery with use of the Cisco Discovery Protocol (CDP) information.

Increase the value if the network has more than 50 devices or does not change

frequently, as often as once a week on average. Increase the value to 14400, which is

once a day. This change decreases how often the discovery daemon runs and results

in better machine performance.

Jump Router Boundaries

By default, the Campus program can discover the router, but does not discover

beyond a router. To discover network devices beyond the router, you must enable the

Jump Router Boundaries option. If you enable this function, however, the discovery

process takes much longer to complete. The length of time to complete depends on

the number of devices that exist beyond the router.

Polling Interval (sec)

This value determines how often, in seconds, the Campus program verifies

connectivity with each device with use of Simple Network Management Protocol

(SNMP). Increase the value if the network has more than 50 devices or does not

change frequently, as often as once a week on average. Increase the value to 3600,

which is every 3 hours. This change decreases how often the SNMP connectivity


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daemon runs and results in better machine performance.

Seed Device(s)

This is the IP address or Domain Name System (DNS) name of the device that is the

"start point" for network discovery. Valid device types are Cisco Catalyst switches

and ATM devices. The Catalyst switches include Catalyst 5000, Catalyst 5500, and

Catalyst 2900 switches. The ATM devices include Cisco LightStream 1010.

Note: The seed device should not be the address of a router or Route Switch Module(RSM).

Note: If you make any changes in the Properties window, clickApply, then choose File >

Save ANI Properties. This action saves the options permanently. If you do not save the

Asynchronous Network Interface (ANI) properties, the old property values return when you

reboot the machine or restart the CWSI daemons.

Q. How do I delete devices from the CWSI Campus topology map?A. CWSI Campus 2.3 (Maintenance Release #1) provided the ability to delete devices from

the Campus topology map. The option to delete devices from the Campus topology map can

be more desirable than reinitialization of the Campus database. Some reasons to choose to

delete devices from the Campus topology map are:

Discovery of a device in the topology map that is no longer in the network

A change, since the initial network discovery, in the IP address of a device that is in

the map

A change in the host name/system name of a device

You delete devices from the Campus topology map with the checkdb command. However,

before you issue the checkdb command, you must exit from the Campus topology map


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window. The checkdb command is in one of these locations, which depends on your

platform:

UNIX

/opt/CSCOcwsi/bin/

Microsoft Windows NT

C:\cwsi\bin

Note: These directory paths are the default installation paths. A difference in the paths

depends on the path you chose during installation.

To remove a device from the Campus topology map, exit from the Campus topology map

window. Then, issue the checkdb command with this syntax:

checkdb ?d $IP_ADDRESS

In this syntax, $IP_ADDRESS represents the IP address of the device that you wish to

remove from the CWSI map. The label of the device displays this IP address, or the label

displays the name of the device that resolves this IP address.

After the checkdb command completes, a reminder to restart the CWSI Campus processes

appears. You can restart the processes with one of these commands, which depends on your

platform:

UNIX

/opt/CSCOcwsi/bin/startcwsiserver

Windows NT

C:\CWSI\bin\startcwsiserver.bat

This list presents several examples:

You want to remove a device that is no longer on the network. IP address 10.1.1.1 is

the device label.

You can remove this device from the CWSI map if you exit from the Campus

topology map window. Then, issue this command:

/opt/CSCOcwsi/bin/checkdb ?d 10.1.1.1

After the checkdb command completes, a reminder to restart the CWSI Campus

processes appears. You can restart the CWSI Campus processes with one of the

UNIX/Windows NT commands in the previous list.

1.

You want to remove a device that has an IP host name label.

You can remove this device from the CWSI map if you exit from the Campus

topology map window. Then, issue the checkdb command.

Note: You must have the ?d option precede the IP address of the machine, not the IP

host name of the machine. Therefore, before you issue the checkdb command, you

must determine the IP address. The label displays the name of the device that resolves

this IP address.

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After the checkdb command completes, a reminder to restart the CWSI Campus

processes appears. You can restart the CWSI Campus processes with one of the

UNIX/Windows NT commands in the previous list.

You want to remove a large number of devices from the map. There are enough

devices that it is tedious to go through the checkdb command process for each

device.

In this situation, you can issue the reinitdb command. This command is in the same

directory as the checkdb command. The reinitdb command replaces the existingCWSI database with a new one. When there is a new CWSI database, CWSI begins

the initial discovery process from the start with no record of the prior database.

Before you issue the reinitdb command, be sure to exit from the Campus topology

map window.

After the reinitdb command runs, the command reinitializes the databases and then

restarts the CWSI Campus processes.

3.

Q. What additional information do I need to know about CampusManager 3.0 network topology map discovery?

A. Like CWSI version 2.x network discovery, Campus Manager 3.0 still requires an initial

seed device or multiple seed devices to discover an entire network. The two discovery

protocols that Campus Manager uses are still Cisco Discovery Protocol (CDP) and Integrated

Logical Management Interface (ILMI).

The name of the application that controls the network discovery process is Asynchronous

Network Interface (ANI). ANI communicates with network devices via Simple Network

Management Protocol (SNMP). On each device, ANI reads the CDP and/or ILMI cache

information to obtain the neighbor device information. Because CDP is a Cisco proprietary

protocol, the only devices that ANI discovery supports are Cisco devices. However, the

exceptions to this rule are the Netscout switch probes, which ANI discovery also supports.ANI can pick up other devices, such as FORE Systems ATM switches, if you have

configured the devices to run ILMI. However, these devices show up as unknown.

Initially, ANI queries each individual device to collect basic device and neighbor information.

This stage is the "Acquire Phase". Later, all information that relates to CDP and ILMI

information aids in the calculation of the overall network topology. This stage is the

"Reduction Phase". At this stage, an analysis of all the CDP cache entries from all devices

occurs.

To control Discovery options, choose CiscoWorks Server > Set Up > Ani Server Admin >

Discovery Settings.

You can edit these properties:

seed devicesYou can enter the IP addresses here as the initial seed devices. Use of a

Cisco Catalyst as the seed device is the best choice. For proper VLAN discovery, at

least one seed device should be a VLAN Trunk Protocol (VTP) server in the VTP

domain.

jump router boundariesThis option allows you to control the discovery range. If you

enable this option, discovery goes beyond the gateway router and extends to the

entire network. Otherwise, discovery only occurs in the local segment that includes

the seed device.


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