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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 OSPF to
filter routes
calculated using
received LSAs.
filter-policy
{ acl-number [
gateway
prefix-list-name ] |
gateway
prefix-list-name
|
prefix-list
prefix-list-name [
gateway
prefix-list-name ] |
route-policy
route-policy-name }
import
By default, OSPF accepts all
routes calculated using received
LSAs.
Configuring Type-3 LSA filtering
Perform this task to filter Type-3 LSAs advertised to an area on an ABR.
To configure Type-3 LSA filtering:
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. Enter area view.
area
area-id N/A
4. Configure Type-3 LSA
filtering.
filter
{ acl-number |
prefix-list
prefix-list-name |
route-policy
route-policy-name } {
export
|
import
}
By default, the ABR does not
filter Type-3 LSAs.
Configuring an OSPF cost for an interface
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) / Expected interface
bandwidth (Mbps). The expected bandwidth of an interface is configured with the bandwidth
command (see Interface Command Reference).
{ 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 no cost or bandwidth reference value is configured for an interface, OSPF computes the
interface cost based on the interface bandwidth and default bandwidth reference value.
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
By default, the OSPF cost is calculated
according to the interface bandwidth.
For a loopback interface, the OSPF cost
is 0 by default.
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