Using Route Tags; Unsupported Features - Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
Table 14: Configuration Tasks for Setting IS-IS Route Tags (continued)

Using Route Tags

You can set only a single route tag per IS-IS route. However, setting a tag for an IS-IS
route has no effect by itself. To use the route tag to apply administrative policies
such as route redistribution, route summarization, or route leaking, you must reference
the tag value in a route map by issuing the match tag command (in Route Map
Configuration mode). The route map must also include one or more set commands
that modify attributes of the routes matching the tag value. These routes can reside
on a different router than the one on which you set the route tag.
For example, the following commands define a route map to modify the metric and
metric type attributes of IS-IS routes configured with a route tag value of 221. The
redistribute isis ip command, as described in "Redistributing Routes Between Levels"
on page 362, applies this route map when redistributing the routes from level 1 into
level 2.
Alternatively, you can use a route map to set the tag for an IS-IS route by issuing the
set tag command (in Route Map Configuration mode). For example, the following
commands define a route map that sets route tag 33 for those IS-IS routes configured
with an administrative distance of 25:
The table-map command, described in "Configuring Table Maps" on page 379, applies
this route map to the IS-IS routes before they are added to the routing table. For
details about configuring and using route maps, see JUNOSe IP Services Configuration
Guide .

Unsupported Features

E Series routers do not currently support the following route tag features:
336
Overview
To Learn About
Setting a route tag for an IS-IS
summary address
host1(config)#route-map map1 permit 5
host1(config-route-map)#match tag 221
host1(config-route-map)#set metric 10
host1(config-route-map)#set metric-type external
host1(config-route-map)#exit
host1(config)#router isis engineering
host1(config-router)#redistribute isis ip level-1 into level-2 route-map map1
host1(config)#route-map map2 permit 10
host1(config-route-map)#match distance 25
host1(config-route-map)#set tag 33
host1(config-route-map)#exit
host1(config)#router isis marketing
host1(config-router)#table-map map2
Multiple route tags for a single IS-IS route
Using This Command See
"summary-address" on "Summarizing Routes" on
page 368 page 368