Setting an OSPFv3 cost for an interface
You can set an OSPFv3 cost for an interface with one of the following methods:
Set the cost value in interface view.
Set a bandwidth reference value for the interface, and OSPFv3 computes the cost automatically based on the bandwidth reference value by using the following formula:
Interface OSPFv3 cost = Bandwidth reference value (100 Mbps) / Interface bandwidth (Mbps)
If the calculated cost is greater than 65535, the value of 65535 is used.
If the calculated cost is smaller than 1, the value of 1 is used.
If no cost is set for an interface, OSPFv3 automatically computes the cost for the interface.
To set an OSPFv3 cost for an interface:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Set an OSPFv3 cost for the interface. | ospfv3 cost cost-value [ instance instance-id ] | By default, the OSPFv3 cost is 1 for a VLAN interface, is 0 for a loopback interface. The OSPFv3 cost is automatically computed according to the interface bandwidth for other interfaces. |
To set a bandwidth reference value:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPFv3 view. | ospfv3 [ process-id | vpn-instance vpn-instance-name ] * | N/A |
3. Set a bandwidth reference value. | bandwidth-reference value | The default setting is 100 Mbps. |