Cisco Systems OL-4580-01 manual Configuring the CSS as an Autonomous System Boundary Router, 3-15

Chapter 3 Configuring Open Shortest Path First (OSPF)

Configuring OSPF on the CSS

Define an address range by specifying an IP address and subnet mask that represents networks in the area being summarized. Enter the IP address and subnet mask in dotted-decimal notation (for example, 192.168.128.0 255.255.224.0). You can also enter the mask in CIDR bit-count notation format (for example, /24).

To configure the CSS as an ABR with an area ID of 0.1.0.1 with a collection of destinations between 192.168.0.0 and 192.168.255.255, enter:

(config)# no ospf enable

(config)# ospf range 0.1.0.1 192.168.0.0 255.255.0.0

To remove the range, enter:

(config)# no ospf range 0.1.0.1 192.168.0.0 255.255.0.0

By default, the ABR advertises this range. If you want to hide the range from the rest of the AS, include the block option. For example:

(config)# ospf range 0.1.0.1 192.168.0.0 255.255.0.0 block

Configuring the CSS as an Autonomous System Boundary Router

If you want the CSS to be an ASBR that exchanges routing information with routers belonging to other autonomous systems, use the ospf as-boundarycommand. Disable OSPF before you enter the ospf as-boundarycommand.

For example:

(config)# no ospf enable

(config)# ospf as-boundary

To remove the CSS as an AS boundary router, enter:

(config)# no ospf as-boundary

	Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01		3-15