Setting The Administrative Distance; Configuring Default Routes - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - IP-IPV6-IGP CONFIGURATION GUIDE 2010-10-31 Configuration Manual

Setting the Administrative Distance

distance ip

Configuring Default Routes

default-information originate
Copyright © 2010, Juniper Networks, Inc.
Use the transition option to accept old-style and new-style metrics; only new-style
metrics are generated.
Specify whether the command applies to level 1, level 2, or both.
Before you set a route tag for an IS-IS interface, you must issue the metric-style wide
command to configure the router to generate and accept TLV type 135, which is a
new-style tuple that contains the route tag.
Example
host1(config-router)#metric-style wide level-1-2
Use the no version to restore the default, which is to generate and accept only old-style
TLVs with narrow (six-bit) metric fields.
See metric-style wide
You can indicate the dependability of a routing information source by configuring the
administrative distance for learned routes.
Use to configure the administrative distance for IS-IS learned routes.
The distance indicates the dependability of a routing information source. A higher
relative value indicates lower dependability. Preference is always given to the routes
with smaller values.
Select a value in the range 1–255. A value of 255 means discard the route.
Example
host1(config-router)#distance ip 50
Use the no version to restore the default value, 115.
See distance ip
You can specify a default route within IS-IS routing domains. You can also suppress the
installation of a default route to level 1-2 routers by level 1 routers.
Optionally, when you issue the default-information originate command and specify a
route map, you can use the map to set a route tag for the default route. Make sure the
route map you specify includes the set tag command, which defines a tag value for the
default route within the IS-IS domain. For details about configuring and using route maps,
see JunosE IP Services Configuration Guide.
Use to generate a default route into an IS-IS routing domain.
When you specify a route map with this command and the router has a route to 0.0.0.0
in the routing table, IS-IS originates an advertisement for 0.0.0.0 in its LSPs.
Chapter 6: Configuring IS-IS
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