H3C Technologies H3C SR8800 - Manual (Page 170)

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• Configure network layer addresses for interfaces, and make sure that all neighboring nodes are
reachable to each other at the network layer.
• Enable IS-IS.
Configuring IS-IS link cost
The IS-IS cost of an interface is determined in the following order:
• IS-IS cost specified in interface view.
• IS-IS cost specified in system view. The cost is applied to the interfaces associated to the IS-IS
process.
• Automatically calculated cost—When 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. When the cost style is of another type: if the interface bandwidth does not exceed
10 Mbps, the interface cost equals 60; if the interface bandwidth does not exceed 100 Mbps, the
interface cost equals 50; if the interface bandwidth does not exceed 155 Mbps, the interface cost
equals 40; if the interface bandwidth does not exceed 622 Mbps, the interface cost equals 30; if
the interface bandwidth does not exceed 2500 Mbps, the interface cost equals 20; if the interface
bandwidth exceeds 2500 Mbps, the interface cost equals 10.
If none of the above costs is used, a default cost of 10 applies.
Configuring an IS-IS cost for an interface
To configure a 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 cost value [ level-1 | level-2 ]
Optional.
By default, no cost is
specified for the interface.
Configuring a global IS-IS cost
To configure 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.