Configuring an OSPF cost for an interface
You can configure an OSPF cost for an interface by using either of the following methods:
Configure the cost value in interface view.
Configure a bandwidth reference value for the interface. OSPF computes the cost with this formula: Interface OSPF 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 less than 1, the value of 1 is used.
If the cost value is not configured for an interface, OSPF computes the interface cost automatically.
To configure an OSPF 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. Configure an OSPF cost for the interface. | ospf cost value | Optional. The default cost depends on the interface type: 1 for a VLAN interface; 0 for a loopback interface; computed according to the bandwidth for other interfaces. |
To configure a bandwidth reference value:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPF view. | ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * | N/A |
3. Configure a bandwidth reference value. | bandwidth-reference value | Optional. The value defaults to 100 Mbps. |