Cisco Systems 5, NAM manual Disabling Auto-Creation of Erspan Data Sources Using the CLI

Chapter 2 Setting Up The NAM Traffic Analyzer

Traffic

The NAM will now automatically create a ERSPAN data source for each device that sends ERSPAN packets to it. The data source will have the specific Session ID that is populated by the device in the ERSPAN packets sent to the NAM. If the same device happens to send ERSPAN packets to the NAM with different Session ID values, a separate data source will be created for each unique Session ID sent from the device.

Disabling Auto-Creation of ERSPAN Data Sources Using the Web GUI

Step 1 Click Setup > Traffic > NAM Data Sources.

Step 2 Click the Auto Create button on the bottom left of the window.

Step 3 Uncheck the ERSPAN check box to toggle auto-creation of ERSPAN data sources to “off”.

Step 4 Click the Submit button.

Disabling Auto-Creation of ERSPAN Data Sources Using the CLI

To disable auto-creation of ERSPAN data sources, use the no autocreate-data-sourcecommand as follows:

root@172-20-104-107.cisco.com# no autocreate-data-source erspan ERSPAN data source autocreate successfully DISABLED root@172-20-104-107.cisco.com#

Creating ERSPAN Data Sources Using the Web GUI

To manually configure a ERSPAN data source on the NAM using the GUI, for example if the auto-creation feature is turned off, use the following steps:

Step 1 Click Setup > Traffic > NAM Data Sources.

Step 2 Click the Create button along the bottom of the window.

Step 3 In the Type drop-down list, select “ERSPAN”.

Step 4 Enter the IP address of the device that will export ERSPAN to the NAM.

Step 5 Give the Data Source a name. This name will appear anywhere there is a Data Source drop-down list.

Step 6 (Optional) Check the Session check box and enter an Session ID into the Value field if the data source should only apply to that specific session. If you leave the check box unchecked, all ERSPAN traffic from the device will be grouped together into this data source, regardless of Session ID.

Devices can be configured with multiple ERSPAN Sessions. The packets exported may have the same source IP address, but the Session ID exported will be a different for each session. If you want to include only one Session in the data source, you must check the “Session” box and provide the value of that Session ID.

Step 7 Click the Submit button.

	User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
2-12	OL-22617-01