3Com Switch 7750 Configuration Guide

338 CHAPTER 35: IS-IS CONFIGURATION
Configuring a Cost Style In IS-IS routing protocol, routing cost of a link can be expressed in one of the
following two modes:
■ Narrow: In this mode, routing cost ranges from 1 to 63.
■ Wide: In this mode, routing cost ranges from 1 to 2
24
-1, namely, 1 to
16777215.
You can specify to support either mode or both.
Configuring Interface
Cost
Configuring IS-IS Timer Configuring the Hello interval
In IS-IS, Hello packets are sent periodically through interfaces and routers maintain
neighbor relationship by sending and receiving Hello packets. You can configure
the Hello interval.
Configure protocol
priority
preference [ value | clns |
ip ] value
Optional
The default priority of IS-IS routes is
15.
Table 264 Configure protocol priority
Operation Command Description
Table 265 Configure IS-IS route cost style
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Configure a cost style cost-style { narrow | wide |
wide-compatible
|{compatible |
narrow-compatible }
[ relax-spf-limit ]}
Optional
By default, IS-IS
receives/sends only the
packets with routing cost
expressed in the Narrow
mode.
Table 266 Configure interface cost
Operation Command Description
Enter system view system-view -
Enter interface view interface interface-type
interface-number
Required
Configure interface cost isis cost value [ level-1 |
level-2 ]
Optional
The default IS-IS interface
cost is 10.
Table 267 Configure the Hello interval
Operation Command Description
Enter system view system-view -
Enter interface view interface interface-type
interface-number
Required