H3C Technologies H3C S12500 Series Switches - Manual (Page 101)

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Only active routes can be redistributed. Use the display ip routing-table protocol command to view route
state information.
Configuring OSPF to redistribute routes from other routing protocols
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 routes, and advertise the redistributed
routes in Type-5 LSAs or Type-7 LSAs. In addition, you can filter redistributed routes so that OSPF
advertises only permitted routes in Type-5 LSAs or Type-7 LSAs.
To configure OSPF route redistribution:
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 protocol.
import-route protocol [ process-id |
all-processes | allow-ibgp ] [ cost cost | type
type | tag tag | route-policy
route-policy-name ] *
Not configured by default.
4. Configure OSPF to filter
redistributed routes before
advertisement.
filter-policy { acl-number | ip-prefix
ip-prefix-name } export [ protocol
[ process-id ] ]
Optional.
Not configured by default.
Configuring OSPF to redistribute a default route
The import-route command cannot redistribute a default external route. Perform this task to redistribute a
default external route.
To configure OSPF to redistribute a default external route:
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. Redistribute a default
route.
default-route-advertise [ [ [ always |
permit-calculate-other ] | cost cost |
route-policy route-policy-name | type
type ] * | summary cost cost ]
Optional.
Not redistributed by default.
The default-route-advertise
summary cost command is
applicable only to VPN. The PE
router advertises the default
route in a Type-3 LSA to the CE
router.
Configuring the default parameters for redistributed routes
Perform this task to configure default parameters, such as the cost, tag, upper limit, and type for
redistributed routes. Tags indicate information related to protocols. For example, when redistributing
BGP routes, OSPF uses tags to identify AS IDs.
To configure the default parameters for redistributed routes: