Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 4 Integrated IS-IS Configuration Commands
3Com Corporation
4-13
By default, IS-IS does not filter the received routing information.
In some cases, only the routing information meeting the specified conditions will be
accepted. You can configure the filter-policy to specify the filter conditions so as to
accept the desired routing information only.
Related command: filter-policy export.
Example
# Filter the received routes by using acl 2003.
[3Com -isis] filter-policy 2003 import
4.1.15 ignore-lsp-checksum-error
Syntax
ignore-lsp-checksum-error
undo ignore-lsp-checksum-error
View
IS-IS view
Parameter
None
Description
Use the ignore-lsp-checksum-error command to configure the IS-IS to ignore the
checksum error of LSP.
Use the undo ignore-lsp-checksum-error command to configure the IS-IS not to
ignore the checksum error of LSP.
By default, the checksum error of LSP is not ignored.
After receiving an LSP packet, the local IS-IS will calculate its checksum and compares
the result with the checksum in the LSP packet. This process is the checksum
authentication over the received LSP. By default, if the checksum in the packet is found
not in consistent with the calculated result, the LSP will be discarded without being
processed. Moreover, if ignoring checksum error is set with the
ignore-lsp-checksum-error command, the packet will be processed as a normal one
even if the checksum error is found.
Example
# Configure to ignore the checksum error of LSP.
[3Com -isis] ignore-lsp-checksum-error