Deployment Guide

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
specied 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 specied 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 ooding of refreshed packets causes.
Related Commands max-lsp-lifetime — sets the maximum interval that LSPs persist without being refreshed.
max-area-addresses
Congure manual area addresses.
Syntax
max-area-addresses number
To return to the default values, use the no max-area-addresses command.
Parameters
number Set the maximum number of manual area addresses. The range is from 3 to 6. The default
is 3.
Defaults 3 addresses
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Intermediate System to Intermediate System (IS-IS) 783