Cisco Systems OL-4580-01 manual Configuring OSPF on the CSS, Configuring the OSPF Router ID, 3-12

Chapter 3 Configuring Open Shortest Path First (OSPF)

Configuring OSPF on the CSS

Configuring OSPF on the CSS

This section includes the following topics:

•Configuring the OSPF Router ID

•Enabling OSPF

•Configuring an Area

•Configuring Equal-Cost Routes

•Configuring Summarized Routes at an ABR

•Configuring the CSS as an Autonomous System Boundary Router

Configuring the OSPF Router ID

Before you enable OSPF on the CSS, configure the router ID. Assigning a router ID to the CSS uniquely identifies it to other routers within the autonomous system. In addition, in the case of a priority tie when determining which router is the designated router, the ID serves as a tie-breaker in the designated router election. For more information on designated routers, see the “Setting the Priority of the CSS” section.

Use the ospf router-idcommand to configure the OSPF router ID for the CSS. A router ID is a 32-bit number in dotted-decimal notation.

To assign the router ID of 121.23.21.1 to the CSS, enter:

(config)# ospf router-id 121.23.21.1

Note If OSPF is globally enabled, use the no form of the ospf enable command to disable OSPF and change the router ID.

To delete the router ID on the CSS, disable OSPF and enter:

(config)# no ospf router-id

	Cisco Content Services Switch Routing and Bridging Configuration Guide
3-12	OL-4580-01