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5.7 RIP route-map

Usage of ripd's route-map support.

Optional argument route-map MAP_NAME can be added to each redistribute statement.

     redistribute static [route-map MAP_NAME]
     redistribute connected [route-map MAP_NAME]

Cisco applies route-map _before_ routes will exported to rip route table. In current Quagga's test implementation, ripd applies route-map after routes are listed in the route table and before routes will be announced to an interface (something like output filter). I think it is not so clear, but it is draft and it may be changed at future.

Route-map statement (see Route Map) is needed to use route-map functionality.

— Route Map: match interface word

This command match to incoming interface. Notation of this match is different from Cisco. Cisco uses a list of interfaces - NAME1 NAME2 ... NAMEN. Ripd allows only one name (maybe will change in the future). Next - Cisco means interface which includes next-hop of routes (it is somewhat similar to "ip next-hop" statement). Ripd means interface where this route will be sent. This difference is because "next-hop" of same routes which sends to different interfaces must be different. Maybe it'd be better to made new matches - say "match interface-out NAME" or something like that.

— Route Map: match ip address word
— Route Map: match ip address prefix-list word

Match if route destination is permitted by access-list.

— Route Map: match ip next-hop A.B.C.D

Cisco uses here <access-list>, ripd IPv4 address. Match if route has this next-hop (meaning next-hop listed in the rip route table - "show ip rip")

— Route Map: match metric <0-4294967295>

This command match to the metric value of RIP updates. For other protocol compatibility metric range is shown as <0-4294967295>. But for RIP protocol only the value range <0-16> make sense.

— Route Map: set ip next-hop A.B.C.D

This command set next hop value in RIPv2 protocol. This command does not affect RIPv1 because there is no next hop field in the packet.

— Route Map: set metric <0-4294967295>

Set a metric for matched route when sending announcement. The metric value range is very large for compatibility with other protocols. For RIP, valid metric values are from 1 to 16.