HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 77
Configuring OSPF route redistribution
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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. Command system-view Remarks N/A 2. Enter OSPF view. ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] * N/A By default, no route redistribution is configured. 3. Configure OSPF to redistribute routes from another routing protocol. import-route protocol [ process-id | all-processes | allow-ibgp ] [ cost cost | route-policy route-policy-name | tag tag | type type ] * This command redistributes only active routes. To view information about active routes, use the display ip routing-table protocol command. 4. (Optional.) Configure filter-policy { acl-number | prefix-list OSPF to filter redistributed ip-prefix-name } export [ protocol routes. [ 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 1. Enter system view. Command system-view Remarks 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 ] 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. 66