Configuring Table Maps

You can use the table-map command to apply a specified route map as a policy filter on an IS-IS route before the route is installed in the routing table. The route map you apply must contain one or more set commands to modify route attributes.

table-map

• Use to apply a policy to modify distance, level, metric, metric type, origin, preference, route type, or tag values of IS-IS routes about to be added to the IP routing table.
• The router applies the new route map to all routes currently in the forwarding table and those about to be installed in the forwarding table.
• If any previously redistributed routes are changed as a result of applying the route map, the router redistributes these routes again with the changes caused by the route map.
• The router removes from the forwarding table any old routes that are now disallowed by the specified route map.
• Issue the command from the IS-IS IPv6 address family to apply a specified route map as a policy filter on an IS-IS IPv6 route before the route is installed in the routing table. IS-IS IPv6 supports only a single table map.
• Example

  The following commands apply a policy (route map) named metricTypeExt to modify the metric type of IS-IS routes configured with a route tag value of 33.

  host1(config)#route-map metricTypeExt permit 5

  host1(config-route-map)#match tag 33

  host1(config-route-map)#set metric-type external

  host1(config-route-map)#exit

  host1(config)#router isis marketing

  host1(config-router)#table-map metricTypeExt

  host1(config-router)#exit

  host1(config)#exit

• Use the no version to halt application of the route map.
• See table-map

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