Configuring Ospf To Filter Received Routes - 3Com 5500-EI PWR Install Manual

Configuring ASBR route summarization for imported routes.
Follow these steps to configure ABR route summarization:
To do...
Enter system view
Enter OSPF view
Enter area view
Enable ABR route
summarization
Follow these steps to configure ASBR route summarization:
To do...
Enter system view
Enter OSPF view
Enable ASBR route
summarization

Configuring OSPF to Filter Received Routes

Follow these steps to configure OSPF to filter received routes:
To do...
Enter system view
Enter OSPF view
Configure to filter the
received routes
OSPF is a dynamic routing protocol based on link state, with routing information hidden in LSAs.
Therefore, OSPF cannot filter any advertised or received LSA. In fact, the filter-policy import
command filters the routes calculated by SPF algorithm (namely, routes in the OSPF routing table); only
the routes passing the filter can be added to the routing table.
Use the command...
system-view
ospf [ process-id [ router-id
router-id ] ]
area area-id
abr-summary ip-address mask
[ advertise | not-advertise ]
Use the command...
system-view
ospf [ process-id [ router-id
router-id ] ]
asbr-summary ip-address mask
[ not-advertise | tag value ]
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
4-19
Remarks
—
—
—
Required
This command takes effect only
when it is configured on an
ABR. By default, this function is
disabled on an ABR.
Remarks
—
—
Required
By default, summarization of
imported routes is disabled.
Remarks
—
—
Required
By default, OSPF does not filter
received routing information.