H3C Technologies H3C S12500 Series Switches - Manual (Page 165)

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Configuring IS-IS link cost
The IS-IS cost of an interface is determined in the following order:
1. IS-IS cost specified in interface view.
2. IS-IS cost specified in system view. The cost is applied to the interfaces associated with the IS-IS
process.
3. Automatically calculated cost. If the cost style is wide or wide-compatible, IS-IS automatically
calculates the cost using the formula: interface cost = (bandwidth reference value/interface
bandwidth) × 10. For other cost styles, Table 6 applies.
Table 6 Automatic cost calculation scheme for cost styles other than wide and wide-compatible
Interface bandwidth Interface cost
≤ 10 Mbps 60
≤ 100 Mbps 50
≤ 155 Mbps 40
≤ 622 Mbps 30
≤ 2500 Mbps 20
> 2500 Mbps 10
4. If none of the above costs is used, a default cost of 10 applies.
Configuring an IS-IS cost for an interface
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Specify an IS-IS cost style.
cost-style { narrow | wide | wide-compatible
| { compatible | narrow-compatible }
[ relax-spf-limit ] }
Optional.
narrow by default.
4. Return to system view. quit N/A
5. Enter interface view. interface interface-type interface-number N/A
6. Specify a cost for the
interface.
isis [ ipv6-unicast ] cost value [ level-1 |
level-2 ] By default, no cost is
specified for the interface.
Configuring a global IS-IS cost
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IS-IS view. isis [ process-id ] [ vpn-instance vpn-instance-name ] N/A
3. Specify an IS-IS
cost style.
cost-style { narrow | wide | wide-compatible |
{ compatible | narrow-compatible }
[ relax-spf-limit ] }
Optional.
narrow by default.