Configuring OSPF

Configuring OSPF

 

 

 

 

In certain cases, redistribution can either be an adjacent route or a subnet. In these cases, the redistributed route can correspond to several routes. It is possible to advertise these routes separately or not with the redist-controlkeyword.

If it is desired to advertise only an aggregated route instead of all the routes to comprise the aggregate, use the ip ospf redist-filtercommand with the redist-control aggregate keyword, as shown (you will also need to enter the route information as above):

-> ip ospf redist-filter rip 1.1.0.0 255.255.0.0 redist-control aggregate

If it is desired that the subnet routes that fall within the aggregate range should not be advertised, use the ip ospf redist-filtercommand with the redist-controlkeyword as shown (you will also need to enter the route information as above):

-> ip ospf redist-filter rip 1.1.0.0 255.255.0.0 redist-control no-subnets

Note. By default, filters are set to allow subnet routes to be advertised. If this is the filter action desired, it is not necessary to use the redist-controlkeyword.

A cost metric and route tag can be assigned to the routes that are allowed to pass through the filter, by using the metric and route-tagkeywords, as shown (these options are described in the ip ospf redist- filter command):

-> ip ospf redist-filter rip 1.1.0.0 255.255.0.0 metric 100 route-tag 5

To display all of the configured filters on a router, enter the show ip ospf redist-filtercommand as shown:

-> show ip ospf redist-filter

To display the configured filters for a specific route or protocol type, enter the show command and the route or protocol type:

-> show ip ospf redist-filter rip

To display a specific filter, enter the show command with the route or protocol type and the ip address and mask, as demonstrated:

-> show ip ospf redist-filter rip 1.1.0.0 255.255.0.0

To delete a redistribution filter, enter the ip ospf redist-filtercommand with the route or protocol type and its associated IP address and mask, as shown:

-> no ip ospf redist-filter rip 1.1.0.0 255.255.0.0

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OmniSwitch 6600 Family Advanced Routing Configuration Guide March 2005

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Alcatel Carrier Internetworking Solutions 060187-10 REV D manual Show ip ospf redist-filter rip