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Chapter 3 Configuring Open Shortest Path First (OSPF)
Configuring OSPF on the CSS
3-14
Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01
To propagate summary LSAs in the stub area, include the send-summaries
option. For example:
(config)# ospf area 0.0.0.1 stub send-summaries
Removing an Area
To remove an OSPF area, disable OSPF, then use the no form of the ospf area
command. For example:
(config)# no ospf enable
(config)# no ospf area 0.0.0.1
Configuring Equal-Cost Routes
By default, the OSPF CSS is configured to use 15 equal-cost routes. Use the ospf
equal-cost command to change the number of routes. Enter a number from 1
to 15.
To configure 10 equal-cost routes for use by the CSS, enter:
(config)# ospf equal-cost 10
To reset the equal-cost routes to its default value of 15, enter:
(config)# no ospf equal-cost
Configuring Summarized Routes at an ABR
If the CSS is an ABR, you can configure it to advertise a single summary route or
network ranges that cover all the individual networks within the specified range.
This summarization helps control routing table sizes and prevents the constant
changing of routes whenever an interface within an area comes online or goes
offline. These route changes do not cause route changes in backbone ABRs and
other area routers.
Use the ospf range command to specify the IP address range to summarize routes
at the ABR. This summarization applies to inter-area paths that are paths to
destinations in other OSPF areas. You can also determine whether you want to
advertise this range. Disable OSPF before you enter the ospf range command.