Reference Guide

Intermediate System to Intermediate System (IS-IS) | 835
Defaults
In IS-IS, the default deletes LSPs with internal checksum errors (no ignore-lsp-errors).
Command Modes
ROUTER ISIS
Usage
Information
IS-IS normally purges LSPs with an incorrect data link checksum, causing the LSP source to
regenerate the message. A cycle of purging and regenerating LSPs can occur when a network link
continues to deliver accurate LSPs even though there is a link causing data corruption. This could
cause disruption to your system operation.
ip router isis
e
Configure IS-IS routing processes on an interface and attach an area tag name to the routing process.
Syntax
ip router isis [tag]
To disable IS-IS on an interface, enter the no ip router isis [tag] command.
Parameters
Defaults
No processes are configured.
Command Modes
INTERFACE
Command
History
Usage
Information
You must use the net command to assign a network entity title to enable IS-IS.
Related
Commands
ipv6 router isis
e
Enable the IPv6 IS-IS routing protocol and specify an IPv6 IS-IS process.
Syntax
ipv6 router isis [tag]
To disable IS-IS routing, enter no router isis [tag].
Parameters
Defaults
Not configured.
Command Modes
ROUTER ISIS
Command
History
tag
(OPTIONAL) The tag you specify identifies a specific area routing process. If you do not specify
a tag, a null tag is assigned.
Version 7.5.1.0 Introduced
net Configures an IS-IS network entity title (NET) for the routing process.
router isis Enables the IS-IS routing protocol.
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 7.5.1.0 Introduced on E-Series