Reference Guide

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Parameters
Defaults
Not configured.
Command Modes
ROUTER ISIS
Command
History
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
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.
Command Mode
ROUTER ISIS (for IPv4)
CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Command
History
Usage
Information
Set the overload bit when a router experiences problems, such as a memory shortage due to an
incomplete link state database which can result in an incomplete or inaccurate routing table. If you set
the overload bit in its LSPs, other routers ignore the unreliable router in their SPF calculations until the
router has recovered.
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.
Version 9.0.2.0 Introduced on the S6000.
Version
8.3.7.0
Introduced on the S4810.
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.
S6000
Version 9.0.2.0 Introduced on the S6000.
Version
8.3.7.0
Introduced on the S4810.