Cisco Systems 78-11741-02 manual Configuring IS-IS Link-State Metrics, IPC-280

Configuring Integrated IS-IS

IS-IS Interface Parameters Configuration Task List

Configuring IS-IS Link-State Metrics

You can configure a cost for a specified interface. You can configure the default-metricvalue for Level 1 or Level 2 routing. To configure the metric for the specified interface, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)# isis metric default-metric	Configures the metric (or cost) for the specified interface.
[level-1 level-2]

Setting the Advertised Hello Interval

You can specify the length of time (in seconds) between hello packets that the Cisco IOS software sends on the interface.

To specify the length of time between hello packets for the specified interface, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)# isis hello-interval{seconds	Specifies the length of time (in seconds) between hello packets
minimal} [level-1 level-2]	the Cisco IOS software sends on the specified interface.

The hello interval can be configured independently for Level 1 and Level 2, except on serial point-to-point interfaces. (Because only a single type of hello packet is sent on serial links, it is independent of Level 1 or Level 2.) Specify an optional level for X.25, Switched Multimegabit Data Service (SMDS), and Frame Relay multiaccess networks. X25, SMDS, ATM, and Frame Relay networks should be configured with point-to-point subinterfaces.

Setting the Advertised CSNP Interval

Complete sequence number protocol data units (CSNPs) are sent by the designated router to maintain database synchronization. You can configure the IS-IS CSNP interval for the interface.

To configure the CSNP interval for the specified interface, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)# isis csnp-intervalseconds	Configures the IS-IS CSNP interval for the specified interface.
{level-1 level-2}

This feature does not apply to serial point-to-point interfaces. It applies to WAN connections if the WAN is viewed as a multiaccess meshed network.

Cisco IOS IP Configuration Guide

IPC-280