Reference Guide

844 | Intermediate System to Intermediate System (IS-IS)
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Defaults
900 seconds
Command Modes
ROUTER ISIS
Command
History
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 caused by the flooding of
refreshed packets.
Related
Commands
max-area-addresses
e
Configure manual area addresses.
Syntax
max-area-addresses number
To return to the default values, enter no max-area-addresses.
Parameters
Defaults
3 addresses
Command Modes
ROUTER ISIS
Usage
Information
Use this command to configure the number of area addresses on router. This value should be consistent
with routers in the same area, or else, the router will form only Level 2 adjacencies. The value should
be same among all the routers to form Level 1 adjacencies.
max-lsp-lifetime
e
Set the maximum time that link-state packets (LSPs) exist without being refreshed.
Syntax
max-lsp-lifetime seconds
To restore the default time, enter no max-lsp-lifetime.
Parameters
Version 7.5.1.0 Expanded to support LSP Throttling Enhancement
max-lsp-lifetime Sets the maximum interval that LSPs persist without being refreshed
number
Set the maximum number of manual area addresses.
Range: 3 to 6.
Default: 3
seconds
The maximum lifetime of LSP in seconds. This value must be greater than the
lsp-refresh-interval. The higher the value the longer the LSPs are kept.
Range: 1 to 65535
Default: 1200