3Com Switch 4800G 24-Port Configuration Manual page 298

298 C 28: OSPF C
HAPTER
Configuring OSPF
Inbound Route Filtering
n
Configuring ABR Type-3
LSA Filtering
Configuring an OSPF
Cost for an Interface
ONFIGURATION
To do...
Enter system view
Enter OSPF view
Configure ASBR route
summarization
Follow these steps to configure inbound route filtering:
To do...
Enter system view
Enter OSPF view
Configure inbound
route filtering
Since OSPF is a link state-based interior gateway protocol, routing information is
contained in LSAs. However, OSPF cannot filter LSAs. Using the filter-policy
import command is to filter routes computed by OSPF, and only routes not
filtered out are installed into the routing table.
Follow these steps to configure Type-3 LSA filtering on an ABR:
To do...
Enter system view
Enter OSPF view
Enter area view
Configure ABR Type-3 LSA
filtering
Follow these steps to configure an OSPF cost for an interface:
To do...
Enter system view
Enter interface view
Configure an OSPF cost
for the interface
Follow these steps to configure a bandwidth reference value:
Use the command...
system-view
ospf [ process-id | router-id
router-id ] *
asbr-summary ip-address
{ mask | mask-length } [ tag tag |
not-advertise | cost cost ] *
Use the command...
system-view
ospf [ process-id | router-id router-id ] *
filter-policy { acl-number | ip-prefix
ip-prefix-name | gateway ip-prefix-name }
import
Use the command...
System-view
ospf [ process-id | router-id
router-id ] *
area area-id
filter { acl-number | ip-prefix
ip-prefix-name } { import |
export }
Use the command...
system-view
interface interface-type
interface-number
ospf cost value
Remarks
-
-
Required
Available on an ASBR only
Not configured by default
Remarks
-
Required
Required
Not configured by default
Remarks
-
-
-
Required
Not configured by default
Remarks
-
-
Optional
By default, an interface computes
its cost according to the bandwidth.
The cost value defaults to 1 for
VLAN interfaces.