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Configuring Integrated IS-IS
IS-IS Interface Parameters Configuration Task List
IPC-280
Cisco IOS IP Configuration Guide
Configuring IS-IS Link-State Metrics
You can configure a cost for a specified interface. You can configure the default-metric value for Level 1
or Level 2 routing. To configure the metric for the specified interface, use the following command in
interface configuration mode:
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:
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:
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.
Command Purpose
Router(config-if)# isis metric default-metric
[level-1 | level-2]
Configures the metric (or cost) for the specified interface.
Command Purpose
Router(config-if)# isis hello-interval {seconds |
minimal} [level-1 | level-2]
Specifies the length of time (in seconds) between hello packets
the Cisco IOS software sends on the specified interface.
Command Purpose
Router(config-if)# isis csnp-interval seconds
{level-1 | level-2}
Configures the IS-IS CSNP interval for the specified interface.