Configuring Ospf Inbound Route Filtering; Configuring Abr Type-3 Lsa Filtering - 3Com S7906E Configuration Manual

To do...
Enter OSPF view
Configure ASBR route
summarization

Configuring OSPF Inbound Route Filtering

For details about IP prefix list, refer to Route Policy Configuration in the IP Routing Volume.
For details about route policy, refer to Route Policy Configuration in the IP Routing Volume.
Since OSPF is a link state-based interior gateway protocol, routing information is contained in LSAs.
Routes computed by OSPF can be filtered and only permitted routes are installed into the routing table.
There are four filtering methods:
Filtering routing information by destination address through ACLs and IP address prefixes.
Filtering routing information by next hop through the filtering criteria configured with the gateway
keyword.
Filtering routing information by destination address through ACLs and IP address prefixes and by
next hop through the filtering criteria configured with the gateway keyword.
Filtering routing information by route policies specified by the route-policy keyword.
Follow these steps to configure inbound route filtering:
To do...
Enter system view
Enter OSPF view
Configure inbound route
filtering

Configuring ABR Type-3 LSA Filtering

This task is configured on an ABR to filter Type-3 LSAs to be advertised in the attached non-backbone
area and the Type-3 LSAs to be advertised to other areas.
Use the command...
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ]*
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 |
vpn-instance instance-name ] *
filter-policy { acl-number [ gateway
ip-prefix-name ] | gateway ip-prefix-name |
ip-prefix ip-prefix-name [ gateway
ip-prefix-name ] | route-policy
route-policy-name } import
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Remarks
—
Required
The command is available on an
ASBR only.
Not configured by default.
Remarks
—
—
Required
Not configured by default.