Administrator Guide

command in OSPF, RIP, ISIS, and BGP to set some of these attributes for routes that are redistributed into
those protocols.
Route maps add to that redistribution capability by allowing you to match specific routes and set or change
more attributes when redistributing those routes.
In the following example, the redistribute command calls the route map static ospf to redistribute
only certain static routes into OSPF. According to the route map static ospf, only routes that have a next
hop of Gigabitethernet interface 0/0 and that have a metric of 255 are redistributed into the OSPF backbone
area.
NOTE: When re-distributing routes using route-maps, you must create the route-map defined in the
redistribute command under the routing protocol. If you do not create a route-map, NO routes are
redistributed.
Example of Calling a Route Map to Redistribute Specified Routes
router ospf 34
default-information originate metric-type 1
redistribute static metric 20 metric-type 2 tag 0 route-map staticospf
!
route-map staticospf permit 10
match interface GigabitEthernet 0/0
match metric 255
set level backbone
Configure a Route Map for Route
Tagging
One method for identifying routes from different routing protocols is to assign a tag to routes from that
protocol.
As the route enters a different routing domain, it is tagged. The tag is passed along with the route as it passes
through different routing protocols. You can use this tag when the route leaves a routing domain to
redistribute those routes again.
In the following example, the redistribute ospf command with a route map is used in ROUTER RIP
mode to apply a tag of 34 to all internal OSPF routes that are redistributed into RIP.
Example of the redistribute Command Using a Route Tag
!
router rip
redistribute ospf 34 metric 1 route-map torip
!
route-map torip permit 10
match route-type internal
set tag 34
!
Access Control Lists (ACLs) 153