3Com Switch 8800 Configuration Guide
Chapter 20 Integrated IS-IS Configuration
20-15
20.2.13 Configuring IS-IS Route Metric Type
IS-IS routing protocol has two styles of route metric:
z
Narrow: The value of route metric ranges from 1 to 63.
z
Wide: The value of route metric ranges from 1 to 16,777,215.
A router can choose either or both of the styles.
Perform the following configuration in IS-IS view.
Table 20-14
Configure the style for route metric values of IS-IS packets
Operation
Command
Configure the style for route
metric values of IS-IS packets
cost-style
{
narrow
|
wide
|
wide-compatible
|
{
compatible
|
narrow-compatible
}
[
relax-spf-limit
] }
Restore the default settings
undo cost-style
By default, IS-IS only receives and sends the packets whose route metric is in narrow
style.
20.2.14 Setting IS-IS Link State Routing Cost
Users can configure the interface cost, namely, the default routing cost.
Perform the following configuration in interface view.
Table 20-15
Set IS-IS link state routing cost
Operation
Command
Set the routing cost of the interface
isis cost value
[
level-1
|
level-2
]
Restore the default routing cost of the
interface
undo isis cost
[
level-1
|
level-2
]
If the level is not specified, the default setting is Level-1 routing cost.
The
value
argument is configured according to the link state of the interface.
By default, the routing cost of IS-IS on an interface is 10.
20.2.15 Configuring IS-IS Timers
I. Setting the Hello packet broadcast interval
The IS-IS periodically sends the Hello packets from the interface and the routers
maintain the adjacency through the transmitting/receiving of the Hello packets The
Hello packet interval can be modified.
