Setting the Link Cost on an OSPFv3 Interface

OSPFv3 can automatically calculate the link cost for an interface based on the interface bandwidth. You can also set the link cost for the interface.

You can control the route cost by setting different link costs for OSPFv3 interfaces.

Perform the following steps on the router that runs OSPFv3:

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
Run ospfv3 cost value [ instance instanceId ]
The link cost is set on the OSPFv3 interface.

If you do not set the cost of an OSPFv3 interface using the ospfv3 cost cost command, OSPFv3 automatically calculates the cost for the interface based on the interface bandwidth. The calculation formula is as follows: Cost of the interface = Bandwidth reference value/Interface bandwidth. The integer of the calculated result is the cost of the interface. If the calculated result is smaller than 1, the cost value is 1. Changing the bandwidth reference value can change the cost of an interface.

Perform the following steps to change the bandwidth reference value:
1. Run system-view
  The system view is displayed.
2. Run ospfv3 [ process-id ]
  OSPFv3 is enabled, and the OSPFv3 view is displayed.
3. Run bandwidth-reference value
  The bandwidth reference value is set.
4. Run commit
  The configuration is committed.
Run commit
The configuration is committed.