Users Guide

set origin {egp | igp | incomplete}
• Specify a tag for the redistributed routes.
CONFIG-ROUTE-MAP mode
set tag tag-value
• Specify a value as the route’s weight.
CONFIG-ROUTE-MAP mode
set weight 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 lters in a route map low. Set commands do not require a corresponding match command.
Congure a Route Map for Route Redistribution
Route maps on their own cannot aect trac and must be included in dierent commands to aect routing trac.
Route redistribution occurs when the system learns the advertising routes from static or directly connected routes or another routing
protocol. Dierent protocols assign dierent 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 specic 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 Tengigabitethernet 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 dened 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 Specied 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 TengigabitEthernet 0/0
match metric 255
set level backbone
Congure a Route Map for Route Tagging
One method for identifying routes from dierent routing protocols is to assign a tag to routes from that protocol.
As the route enters a dierent routing domain, it is tagged. The tag is passed along with the route as it passes through dierent 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
140
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