Cisco WS-X6K-SUP1A-2GE-RF Software Guide - Page 516

MSFC Redundancy Chapter 22 Configuring Redundancy Configuration Guidelines Use these guidelines when configuring SRM redundancy: • SRM redundancy requires that both the designated router and nondesignated router run the same Cisco IOS image. • SRM redundancy requires that a Cisco IOS image is present in the bootflash of both the designated router and nondesignated router. • With SRM redundancy, the nondesignated router cannot connect to external networks. • With SRM redundancy, we do not recommend booting from an external network with the designated router. Booting from the network could severely degrade SRM functionality. • With SRM redundancy, the designated router can reach external networks and copy commands such as copy tftp: can be used without any restrictions. • For SRM to work properly, high availability must be enabled on the supervisor engine. • When using authentication methods to control access to the switch such as RADIUS or TACACS+, you need to configure a fallback option to login in with a local username and password if you want to be able to access the nondesignated router through the switch console or session commands. See Chapter 21, "Configuring Switch Access Using AAA" for information on configuring the fallback option. Configuring Single Router Mode Redundancy To configure SRM redundancy, perform these steps: Caution Before going from dual router mode to SRM redundancy, we recommend that you use the copy running-config command on the MSFCs to save the non-SRM configuration to bootflash. When going to SRM redundancy, the alternative configuration (the configuration following the alt keyword) is lost. Therefore, before enabling SRM redundancy, save the dual router mode configuration to bootflash by entering the following command on both MSFCs: copy running-config bootflash:nosrm_dual_router_config. See the "Getting Out of Single Router Mode" section on page 22-45 for additional information. Note This procedure assumes that the designated router is the MSFC2 in slot 1 and the nondesignated router is the MSFC2 in slot 2; the active supervisor engine is in slot 1 and the standby supervisor engine is in slot 2. Step 1 Step 2 Step 3 Enter the show version command to ensure that both supervisor engines are running supervisor engine software release 6.3(1) or later releases. Enter the set system highavailability enable command to enable high availability on the active supervisor engine. Enter the show system highavailability command to verify that high availability is enabled. If you have a console connection, enter the switch console command to access the designated router. If connected through a Telnet session, enter the session mod command to access the designated router. 22-42 Catalyst 6000 Family Software Configuration Guide-Releases 6.3 and 6.4 78-13315-02