Cisco Systems OL-3597-01 manual Automatic Discovery, Automatically Discovering Chassis

Chapter 3 Deploying and Discovering Objects

Automatic Discovery

Automatic Discovery

Objects which are physically present in the network can be automatically discovered on the chassis and subchassis levels. You can choose to use the Cisco EMF Auto Discovery tool to detect devices based on IP and/or SNMP data. This capability applies to the chassis only. Similarly, modules automatically discover as a part of subchassis discovery and regular heartbeat polling.

The following sections describes each of these features in detail:

•Automatically Discovering Chassis

•Automatically Discovering Modules

Automatically Discovering Chassis

Auto discovery is the application that discovers existing Cisco chassis, saving time and effort. Chassis automatic discovery requires user specification of IP and SNMP data, establishing a range of network elements that the tool then polls for.

The auto discovery window opens from the Viewer or Discovery icons on the Launchpad.

Note For further information regarding the Cisco EMF Launchpad, see the Cisco Element Management Framework User Guide Release 3.2.

The Auto discovery application has three mechanisms for discovering chassis:

•IP—ICMP pings are used to find chassis in a given IP address range. This finds which IP device exists, but does not discover what kind of device it is.

•SNMP—SNMP get requests are used to find chassis in a given IP address range. Several SNMP community strings can be used so that equipment with different community strings can be discovered in the same discovery session. The SNMP information returned by devices is used to work out what kind of device has been found.

•IP and SNMP—ICMP pings are used to find chassis and then SNMP requests are used to interrogate the chassis to find out what kind of chassis they are. This is the default mechanism.

Auto discovery can discover chassis on more than one subnetwork using multi–hop discovery. It can be scheduled to run at preset times. An option is also available to specify the physical location under which discovered objects are created.

Note For information on how to set the auto discovery schedule, see the Cisco Element Management Framework Installation and Administration Guide Release 3.2.

After the chassis is detected, an object representing the chassis creates and is placed under the site from which auto discovery was launched. A map of the chassis also creates, as shown in Figure 3-20 on page 3-22.

If you wish to auto–discover a chassis that can be managed by the EM, then the Physical Path option must be enabled and an appropriate Physical Path (terminated with a generic object) must be selected. Providing the above is done, the auto discovery application will create a chassis below the selected Physical Path for each chassis discovered.

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3-2 OL-3597-01