3Com Router 3031, Command Reference Manual

Page: 613 / 838

Integrated IS-IS Configuration Commands 613
only one type of hello message is sent and received on the point-to-point link. In
this way, excessive processing is avoided, and the bandwidth is saved.
Only when system type of IS-IS is Level-1-2, can the circuit level take effect.
Otherwise, take the level defined via is-level command as the standard.
For the related command, see is-level.
Example
When interface serial1/0/0 is connected with a non-backbone router in the same
area, you can set this interface as Level-1, prohibiting the sending and receiving of
Level-2 hello messages.
[3Com] interface serial1/0/0
[3Com-Serial1/0/0] isis enable
[3Com-Serial1/0/0] isis circuit-level level-1
isis cost
Syntax
isis cost value [ level-1 | level-2 ]
undo isis cost [ level-1 | level-2 ]
View
Interface view
Parameter
■
value: Specifies the link cost used in the SPF calculation of corresponding level.
By default, the value is 10. When the cost type is “narrow”, its range is 1
through 63; when the cost type is wide, its range is 1 to 16777215.
■
level-1: Indicates that the link cost corresponds to Level-1
■
level-2: Indicates that the link cost corresponds to Level-2
Description
Using the isis cost command, you can configure the link cost of this interface
when performing SPF calculation. Using the undo isis cost command, you can
restore the default link cost.
If neither Level-1 nor Level-2 is specified in the configuration, Level-1 will be the
default value.
The link cost for interfaces will effect the calculation of IS-IS routes.
For the related command, see cost-style.
Example
Set the link cost of the Level-2 link on Interface serial1/0/0 to 5.
[3Com] interface serial1/0/0
[3Com-Serial1/0/0] isis cost 5 level-2
isis dis-priority Syntax
isis dis-priority value [ level-1 | level-2 ]
undo isis dis-priority [ level-1 | level-2 ]