3Com Switch 7750 Configuration Guide Guide

328 CHAPTER 35: IS-IS CONFIGURATION
When the overload tag is set, other routers will not ask the router to forward
packets.
Configuring to Discard
LSPs with Incorrect
Checksum
Checksum is performed on the LSPs received locally by IS-IS and compared with
that carried in the LSPs By default, the LSP will not be discarded even if its
checksum is inconsistent with that calculated. You can use the
ignore-lsp-checksum-error command to configure IS-IS to discard an LSP with
incorrect checksum.
Configuring to Log Peer
Changes
With peer state logging enabled, IS-IS peer state changes are output to the
console terminal.
Assigning an LSP
Refresh Time
All LSPs are sent periodically to synchronize the LSPs in an area.
Tabl e 259 Configure overload tag
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Configure overload tag set-overload
Optional
No overload tag is set by
default.
Tabl e 260 Configure to discard LSPs with incorrect checksum
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Configure to discard LSPs with
incorrect checksum
ignore-lsp-checksum-error
Optional
By default, LSP checksum
error is ignored.
Tabl e 261 Enable peer change logging
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Enable peer change logging log-peer-change
Optional
By default, peer change
logging is disabled.
Tabl e 262 Assign an LSP refresh time
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Assign an LSP refresh time timer lsp-refresh seconds
Optional
By default, LSPs are refreshed
every 900 seconds, namely,
15 minutes.