Reference Guide

Intermediate System to Intermediate System (IS-IS) | 851
Command
History
Usage
Information
How a metric value assigned to a redistributed route is advertised depends on how on the configuration
of the metric-style command. If the metric-style command is set for narrow mode and the metric value
in the redistribute ospf command is set to a number higher than 63, the metric value advertised in LSPs
will be 63. If the metric-style command is set for wide mode, an the metric value in the redistribute
ospf command is advertised.
router isis
e
Allows you to enable the IS-IS routing protocol and to specify an IP IS-IS process.
Syntax
router isis [tag]
To disable IS-IS routing, enter no router isis [tag].
Parameters
Defaults
Not configured.
Command Modes
ROUTER ISIS
Usage
Information
You must configure a network entity title (the net command) to specify the area address and the router
system ID.
You must enable routing on one or more interfaces to establish adjacencies and establish dynamic
routing.
Only one IS-IS routing process can be configured to perform Level 2 routing. A level-1-2 designation
performs Level 1 and Level 2 routing at the same time.
Related
Commands
set-overload-bit
e
Configure the router to set the overload bit in its non-pseudonode LSPs. This prevents other routers
from using it as an intermediate hop in their shortest path first (SPF) calculations.
Syntax
set-overload-bit
To return to the default values, enter no set-overload-bit.
Defaults
Not set.
Version 7.5.1.0 Introduced IPv6 ISIS support
Version 6.3.1.0 Introduced
tag
(OPTIONAL) This is a unique name for a routing process. A null tag is assumed if the tag option
is not specified. The tag name must be unique for all IP router processes for a given router.
ip router isis Configure IS-IS routing processes for IP on interfaces and attach an area designator
to the routing process.
net Configure an IS-IS network entity title (NET) for a routing process.
is-type Assign a type for a given area.