Users Guide

Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
The link MTU and the LSP MTU size must be the same.
Because each device can generate a maximum of 255 LSPs, consider carefully whether
you use the lsp-mtu command.
lsp-refresh-interval
Set the link state PDU (LSP) refresh interval. LSPs must be refreshed before they expire. When the LSPs are not
refreshed after a refresh interval, they are kept in a database until their max-lsp-lifetime reaches zero and
then LSPs is purged.
Syntax
lsp-refresh-interval seconds
To restore the default refresh interval, use the no lsp-refresh-interval
command.
Parameters
seconds The LSP refresh interval, in seconds. This value has to be less
than the seconds value specified with the max-lsp-lifetime
command. The range is from 1 to 65535 seconds. The default is
900.
Defaults 900 seconds
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
The refresh interval determines the rate at which route topology information is
transmitted preventing the information from becoming obsolete.
The refresh interval must be less than the LSP lifetime specified with the max-lsp-
lifetime command. A low value reduces the amount of time that undetected link
state database corruption can persist at the cost of increased link utilization. A higher
value reduces the link utilization the flooding of refreshed packets causes.
Intermediate System to Intermediate System (IS-IS) 940