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Configuring RIP RIP Redistribution

OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 16-13

Configuring a Redistribution Filter Metric

You can prioritize redistribution of route types to a network by assigning a metric value to a route type(s).

The default redistribution filter metric is 1. However, you can lower the priority of a route type by increas-

ing its metric value. For example, if you want to give priority to OSPF routes to a particular network, you

would set the metric value for the other route types to 2.

Use the ip rip redist-filter metric command to configure a metric value. Enter the command, specify the

route type to be redistributed, enter the destination IP address/mask, and then enter the metric value. For

example, if you wanted to lower the priority of OSPF routes to a network and all other route types were

set to the default metric of 1, you would need to set a metric value of 2 for OSPF routes destined for that

network.

-> ip rip redist-filter metric ospf 172.22.0.0 255.255.0.0 metric 2

Note. If you are configuring a metric value for more than one route type, you must repeat the command

for each one.

The redistribution filter metric range is 0 to 15. The default is 0.

Configuring the Redistribution Filter Route Control Action

In certain cases, the specified route to be filtered will be either an aggregate route or a subnet. In these

cases, the route may comprise several routes. It is possible to redistribute these routes separately or not

using the ip rip redist-filter redist-control command. Enter the command, specify the route type to be

redistributed, enter the destination IP address/mask, and then enter a route control action:

• all-subnets. Redistributes all subnet routes that match this filter, if permitted (default).

• aggregate. Redistributes an aggregate route if there are one or more routes that match this filter.

• no-subnets. Redistributes only those routes that exactly match the redistribution filter.

For example, if the route being filtered is an aggregate or subnet route and the routes that comprise the

aggregate or subnet route should not be redistributed, enter the ip rip redist-filter redist-control

command, and the no-subnets keyword.

-> ip rip redist-filter ospf 172.22.0.0 255.255.0.0 redist-control no-subnets

Note. By default, filters are set to allow subnet routes to be advertised. If this is the filter action required, it

is not necessary to use the redist-control keyword.

Configuring a Redistribution Filter Route Tag

The redistribution route tag specifies the route tag using which routes matching a filter are redistributed

into the RIP. The default value is zero (0), which means that the route tag used will be the one in the route,

if specified.

Use the ip rip redist-filter route-tag command to configure a redistribution route tag. Enter the

command, specify the route type to be redistributed, enter the destination IP address/mask, and then enter

the route tag value. For example, if you wanted to configure a route tag value of 1 for OSPF routes to the

172.22.0.0 network you would enter:

-> ip rip redist-filter ospf 172.22.0.0 255.255.0.0 route-tag 1

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