• Specify a value for redistributed routes.
CONFIG-ROUTE-MAP mode
set metric {+ | - | metric-value}
• Specify an OSPF or ISIS type for redistributed routes.
CONFIG-ROUTE-MAP mode
set metric-type {external | internal | type-1 | type-2}
• Assign an IP address as the route’s next hop.
CONFIG-ROUTE-MAP mode
set next-hop ip-address
• Specify a tag for the redistributed routes.
CONFIG-ROUTE-MAP mode
set tag tag-value
To create route map instances, use these commands. There is no limit to the number of set commands
per route map, but the convention is to keep the number of set filters in a route map low. Set commands
do not require a corresponding match command.
Configure a Route Map for Route Redistribution
Route maps on their own cannot affect traffic and must be included in different commands to affect
routing traffic. To apply a route map to traffic, you must call or include that route map in a command
such as the redistribute or default-information originate commands in OSPF and BGP.
Route redistribution occurs when the system learns the advertising routes from static or directly
connected routes or another routing protocol. Different protocols assign different values to redistributed
routes to identify either the routes and their origins. The metric value is the most common attribute that
is changed to properly redistribute other routes into a routing protocol. Other attributes that can be
changed include the metric type (for example, external and internal route types in OSPF) and route tag.
Use the redistribute 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
134 Access Control Lists (ACLs)