3Com Switch 7754, Configuration Manual

Page: 314 / 940

314 C
HAPTER
34: OSPF C
ONFIGURATION
Configuration
Prerequisites
Before configuring OSPF route control, perform the following tasks:
■
Configuring the network layer addresses of interfaces so that the adjacent
nodes are reachable to each other at the network layer
■
Completing basic OSPF configuration
■
Configuring filter list to filter routing information
Configuring OSPF Route
Summary
The configuration of OSPF route summary includes:
■
Configuring ABR route summary,
■
Configuring ASBR route summary for imported routes.
Configuring OSPF to
Filter Received Routes
n
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
Table 236 Configure ABR route summary
Operation Command Description
Enter system view system-view -
Enter OSPF view ospf [ process-id
[ router-id router-id ] ]
-
Enter area view area area-id -
Enable ABR route summary abr-summary ip-address
mask [ advertise |
not-advertise ]
Required
This command takes effect
only when it is configured
on an ABR. By default, this
function is disabled on an
ABR.
Table 237 Configure ASBR route summary
Operation Command Description
Enter system view system-view -
Enter OSPF view ospf [ process-id
[ router-id router-id ] ]
-
Enable ASBR route summary asbr-summary ip-address
mask [ not-advertise | tag
value ]
Required
This command takes
effect only when it is
configured on an ASBR.
By default, summary of
imported routes is
disabled.
Table 238 Configure OSPF to filter received routes
Operation Command Description
Enter system view system-view -
Enter OSPF view ospf [ process-id [ router-id
router-id ] ]
-
Configure to filter the received
routes filter-policy { acl-number |
ip-prefix ip-prefix-name |
gateway ip-prefix-name }
import
Required
By default, OSPF does not
filter received routing
information.