3Com 8807 Configuration Manual page 354

354 C 32: I
HAPTER NTEGRATED
Setting Overload Flag
Setting to Discard the
LSPs with Checksum
Errors
Setting to Log the Peer
Changes
Setting LSP Refreshment
Interval
IS-IS C
ONFIGURATION
Sometimes, the router in the IS-IS domain may encounter some problems in
Bit operation thus errors may occur in the whole routing area. In order to avoid this
problem, you can set the overload flag bit for this router.
When the overload threshold is set, other routers should not send this router the
packets which should be forwarded by it.
Perform the following configurations in IS-IS view.
Table 333 Set overload flag bit
Operation
Set overload flag bit
Remove the overload flag bit
By default, no over load bit is set.
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, even when the
checksum in the packet is not consistent with the calculated result, the LSP packet
is not discarded. However, when not ignoring LSP checksum error is set with the
ignore-lsp-checksum-error command, the LSP packet will be discarded if the
checksum error is found.
Perform the following configuration in IS-IS view.
Table 334 Set to discard the LSPs with checksum errors
Operation
Set to discard the LSP with checksum error
Set to ignore the LSP checksum error
By default, the LSP checksum error is ignored.
After peer changes log is enabled, the IS-IS peer changes will be output on the
configuration terminal until the log is disabled.
Perform the following configuration in IS-IS view.
Table 335 Set to log the peer changes
Operation
Enable peer changes log
Disable peer changes log
By default, the peer changes log is disabled.
In order to ensure that the LSPs in the whole area can maintain the
synchronization, all the current LSPs will be transmitted periodically.
Perform the following configuration in IS-IS view.
Command
set-overload
undo set-overload
Command
ignore-lsp-checksum-error
undo ignore-lsp-checksum-error
Command
log-peer-change
undo log-peer-change