Administrator Guide

• 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.
Dell#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
Dell#
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. The system supports five different metric styles: narrow,
wide, transition, narrow transition, and wide transition.
By default, the system 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 example, if you configure the metric as
narrow, and a link state PDU (LSP) with wide metrics is received, the route is not installed.
The system supports the following IS-IS metric styles.
Table 43. Metric Styles
Metric Style Characteristics Cost Range Supported on IS-IS
Interfaces
narrow Sends and accepts narrow or old TLVs
(Type, Length, Value).
0 to 63
wide Sends and accepts wide or new TLVs. 0 to 16777215
transition Sends both wide (new) and narrow (old)
TLVs.
0 to 63
narrow transition Sends narrow (old) TLVs and accepts both
narrow (old) and wide (new) TLVs.
0 to 63
wide transition Sends wide (new) TLVs and accepts both
narrow (old) and wide (new) TLVs.
0 to 16777215
To change the IS-IS metric style of the IS-IS process, use the following command.
• Set the metric style for the IS-IS process.
ROUTER ISIS mode
metric-style {narrow [transition] | transition | wide [transition]} [level-1 | level-2]
The default is narrow.
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Intermediate System to Intermediate System