Related 
Commands
clns host – defines a name-to-NSAP mapping.
ignore-lsp-errors
Ignore LSPs with bad checksums instead of purging those LSPs.
E-Series, S4810
Syntax
ignore-lsp-errors
To return to the default values, use the no ignore-lsp-errors command.
Defaults In IS-IS, the default deletes LSPs with internal checksum errors (no ignore-lsp-
errors
).
Command Modes ROUTER ISIS
Command History
Version 8.3.12.0 Introduced on the S4810.
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 process could cause disruption to your system operation.
ip router isis
Configure IS-IS routing processes on an interface and attach an area tag name to the routing process.
E-Series, S4810
Syntax
ip router isis [tag]
To disable IS-IS on an interface, use the no ip router isis [tag] command.
Parameters
tag
(OPTIONAL) The tag you specify identifies a specific area routing 
process. If you do not specify a tag, a null tag is assigned.
Defaults No processes are configured.
Command Modes INTERFACE
Command History
Version 8.3.12.0 Introduced on the S4810.
Version 7.5.1.0 Introduced.
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