Administrator Guide

Restart Capable Neighbors: 2, In Start: 0, In Restart: 0
DellEMC#
Changing LSP Attributes
IS-IS routers flood link state PDUs (LSPs) to exchange routing information. LSP attributes include the generation interval,
maximum transmission unit (MTU) or size, and the refresh interval.
You can modify the LSP attribute defaults, but it is not necessary.
To change the defaults, use any or all of the following commands.
● Set interval between LSP generation.
ROUTER ISIS mode
lsp-gen-interval [level-1 | level-2] seconds
○ seconds: the range is from 0 to 120.
The default is 5 seconds.
The default level is Level 1.
● Set the LSP size.
ROUTER ISIS mode
lsp-mtu size
○ size: the range is from 128 to 9195.
The default is 1497.
● Set the LSP refresh interval.
ROUTER ISIS mode
lsp-refresh-interval seconds
○ seconds: the range is from 1 to 65535.
The default is 900 seconds.
● Set the maximum time LSPs lifetime.
ROUTER ISIS mode
max-lsp-lifetime seconds
○ seconds: the range is from 1 to 65535.
The default is 1200 seconds.
To view the configuration, use the show config command in ROUTER ISIS mode or the show running-config isis
command in EXEC Privilege mode.
DellEMC#show running-config isis
!
router isis
lsp-refresh-interval 902
net 47.0005.0001.000C.000A.4321.00
net 51.0005.0001.000C.000A.4321.00
DellEMC#
Configuring the IS-IS Metric Style
All IS-IS links or interfaces are associated with a cost that is used in the shortest path first (SPF) calculations. The possible cost
varies depending on the metric style supported.
If you configure narrow, transition, or narrow transition metric style, the cost can be a number between 0 and 63. If you
configure wide or wide transition metric style, the cost can be a number between 0 and 16,777,215. Dell EMC Networking OS
supports five different metric styles: narrow, wide, transition, narrow transition, and wide transition.
By default, Dell EMC Networking OS generates and receives narrow metric values. Matrixes or costs higher than 63 are not
supported. To accept or generate routes with a higher metric, you must change the metric style of the IS-IS process. For
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Intermediate System to Intermediate System