Initial Configuration › Configure CA Network Flow Analysis to Work with CA Performance Center › Configure Flow Collection › Set Up the Routers

Set Up the Routers

To enable NetFlow on CA Network Flow Analysis routers, complete the following steps on each router that supports NetFlow versions 5, 7, or 9.

Note: Before you begin, collect the following information for each router that you plan to monitor:

• Source address
• SNMP read community string
• NetFlow version (if applicable)

Flow Protocols Supported: CA Network Flow Analysis 9.0.00 supports the following flow protocols:

• NetFlow support v5, v7, and v9.
• sFlow version 5.
• IPFIX, J-Flow, and cFlow that is compliant with the standards for NetFlow v5, v7, or v9.

Follow these steps:

1. Save a backup copy of the current configuration to a TFTP (Trivial File Transfer Protocol) server or to the desktop.
2. Execute the copy run start or wr mem command before you make any changes to the routers that you want to monitor.

   Running this command helps ensure that all current configurations are saved to static memory in case the router locks up or reboots.

3. Configure NetFlow export by entering the following IOS commands in the order shown:

   ip flow-export version <version_number>
   ip flow-export source <interface>
   ip flow-export destination <IP address of the installation system> 9995
   ip flow-cache timeout active 1
   

   Note: For the second command in the series, the IP address of the source interface can change. Cisco recommends that you configure a loopback source interface to use.

4. For each logical interface, navigate to the interface and enter:

   ip route-cache flow
   

   or

   ip flow ingress (for newer versions of IOS)
   

5. Configure index persistence on each router by using the following command:

   config# snmp-server ifindex persist
   

   Note: Routers in the Cisco 7200 Series, 7500 Series, and 12000 GSR family support index persistence.

6. Verify that you have a Sup II or greater supervisor engine, if you use Catalyst 6500 and 7600 switches.

   Note: For additional Catalyst 6500 and 7600 switch commands, refer to Cisco's NetFlow commands documentation.