Configuring Ospf Preference; Configuring Ospf Route Redistribution - HP 6125XLG Layer 3 - Ip Routing Configuration Manual

Configuring OSPF preference

A router can run multiple routing protocols, and each protocol is assigned a preference. If multiple routes
are available to the same destination, the one with the highest protocol preference is selected as the best
route.
To configure OSPF preference:
Step
1. Enter system view.
2. Enter OSPF view.
3. Configure a
preference for OSPF.

Configuring OSPF route redistribution

On a router running OSPF and other routing protocols, you can configure OSPF to redistribute routes
from other protocols, such as RIP, IS-IS, BGP, static, and direct, and advertise them in Type-5 LSAs or
Type-7 LSAs. In addition, you can configure OSPF to filter redistributed routes so that OSPF advertises
only permitted routes.
IMPORTANT:
The import-route bgp command redistributes only EBGP routes. Because the import-route bgp
allow-ibgp command redistributes both EBGP and IBGP routes, and might cause routing loops, use it with
caution.
Configuring OSPF to redistribute routes from another routing protocol
Step
1. Enter system view.
2. Enter OSPF view.
3. Configure OSPF to
redistribute routes from
another routing protocol.
4. (Optional.) Configure
OSPF to filter redistributed
routes.
Command
system-view
ospf [ process-id | router-id router-id
| vpn-instance vpn-instance-name ] *
preference [ ase ] [ route-policy
route-policy-name ] value
Command
system-view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
import-route protocol [ process-id |
all-processes | allow-ibgp ] [cost cost |
nssa-only | route-policy
route-policy-name | tag tag | type type ]
*
filter-policy { acl-number | prefix-list
prefix-list-name } export [ protocol
[ process-id ] ]
78
Remarks
N/A
N/A
By default, the preference of OSPF
internal routes is 10 and the preference
of OSPF external routes is 150.
Remarks
N/A
N/A
By default, no route redistribution
is configured.
This command redistributes only
active routes. To view information
about active routes, use the
display ip routing-table protocol
command.
By default, OSPF accepts all
redistributed routes.