Configuring Ospf Route Redistribution - HP HPE FlexNetwork 7500 series Configuration Manual

Configuring OSPF route redistribution

On a router running OSPF and other routing protocols, you can configure OSPF to redistribute static
routes, direct routes, or routes from other protocols, such as RIP, IS-IS, and BGP. OSPF advertises
the routes 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.
Redistributing 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.
Redistributing 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
1. Enter system view.
2. Enter OSPF view.
3. Redistribute a default
route.
Configuring default parameters for redistributed routes
Perform this task to configure default parameters for redistributed routes, including cost, tag, and
type. Tags identify information about protocols. For example, when redistributing BGP routes, OSPF
uses tags to identify AS IDs.
To configure the default parameters for redistributed routes:
Command
system-view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
import-route protocol [ as-number ]
[ process-id | all-processes |
allow-ibgp ] [ allow-direct | cost
cost-value | nssa-only | route-policy
route-policy-name | tag tag | type type ]
*
filter-policy { ipv4-acl-number |
prefix-list prefix-list-name } export
[ protocol [ process-id ] ]
Command
system-view
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
default-route-advertise [ [ always |
permit-calculate-other ] | cost
cost-value | route-policy
route-policy-name | type type ] *
default-route-advertise [ summary
cost cost-value ]
83
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.
Remarks
N/A
N/A
By default, no default route is
redistributed.
This command is applicable
only to VPNs. The PE router
advertises a default route in a
Type-3 LSA to a CE router.