76
Step Command
Remarks
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] * N/A
3.
Configure a
preference for OSPF.
preference
[
ase
] [
route-policy
route-policy-name
]
value
By default, the preference of OSPF
internal routes is 10 and the preference
of OSPF external routes is 150.
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 Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] *
N/A
3.
Configure OSPF to
redistribute routes from
another routing protocol.
import-route
protocol
[
process-id
|
all-processes
|
allow-ibgp
] [
cost
cost
|
nssa-only
|
route-policy
route-policy-name
|
tag
tag
|
type
type
]
*
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.
4.
(Optional.) Configure
OSPF to filter redistributed
routes.
filter-policy
{
acl-number
|
prefix-list
ip-prefix-name
}
export
[
protocol
[
process-id
] ]
By default, OSPF accepts all
redistributed routes.
Configuring OSPF to redistribute a default route
The
import-route
command cannot redistribute a default external route. Perform this task to redistribute a
default route.
To redistribute a default route:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
