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Configuring IS-IS Configuring IS-IS
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide December 2007 page 3-29
Route Map Redistribution Example
The following example configures the redistribution of RIP routes into an IS-IS network using a route map
(rip-to-isis) to filter specific routes:
-> ip route-map rip-to-isis sequence-number 10 action deny
-> ip route-map rip-to-isis sequence-number 10 match metric 5
-> ip route-map rip-to-isis sequence-number 20 action permit
-> ip route-map rip-to-isis sequence-number 20 match ipv4-interface intf_isis
-> ip route-map rip-to-isis sequence-number 20 set metric 60
-> ip route-map rip-to-isis sequence-number 30 action permit
-> ip route-map rip-to-isis sequence-number 30 set metric 8
-> ip redist rip into isis route-map rip-to-isis
The resulting rip-to-isis route map redistribution configuration does the following:
• Denies the redistribution of RIP routes with a metric value set to five.
• Redistributes into IS-IS all routes learned on the intf_isis interface and sets the metric for such routes
to 60.
Note. Wide metrics need to be enabled, if a metric of more than 64 is configured.
• Redistributes all other routes (those not processed by sequence 10 or 20) and sets the metric for such
routes to eight.
IS-IS allows redistributing Level-1 IS-IS routes into Level-2 IS-IS routes. This is termed as Level-1 to
Level-2 Leaking. This release also supports the prefix distribution from the level-2 IS-IS routes to level-1
IS-IS routes.
The following example configures the IS-IS Level-1 to Level-2 Leaking routes using a route map (is2is) to
filter specific routes.
To redistribute IS-IS Level-1 routes into IS-IS Level-2 routes, use the following route map sequence:
-> ip route-map is2is sequence-number 1 action permit
-> ip route-map is2is sequence-number 1 match route-type level1
-> ip route-map is2is sequence-number 1 set level level2
-> ip redist isis into isis route-map is2is status enable
The resulting is2is route map redistribution configuration redistributes all Level-1 IS-IS routes into Level-
2 IS-IS routes.