Dell SmartFabric OS10 User Guide Release 10.5.3

Add routes from other routing instances or protocols to the BGP process. You can include OSPF, static, or directly connected routes in the BGP process with the redistribute command.

• Include directly connected or user-configured (static) routes in ROUTER-BGP-AF mode.

  redistribute {connected | static}

• Include specific OSPF routes in IS-IS in ROUTER-BGP-AF mode (1 to 65535).

  redistribute ospf process-id

Disable redistributed routes

OS10(conf-router-bgp-af)# no redistribute ospf route-map ospf-to-bgp

All the paths that an OS10 device learns; for example, static route, connected routes, and redistributed routes from different protocols, are valid. However, the system maintains only the route that has the shortest administrative distance from the source as the active route path. The system marks other valid paths as inactive routes in the routing table. When an active path is removed, the next best valid path based on the shortest administrative distance becomes the active route path. The order of preference based on the protocol source is:

1. Connected
2. Static
3. EBGP
4. OSPF
5. IBGP

Before Release 10.5.2.0, the redistribute command redistributed active and inactive route paths. By default, from Release 10.5.2.0 and beyond, this command redistributes only active route paths. If you have configured route redistribution, when you upgrade to Release 10.5.2.0 or later, the inactive route paths are no longer redistributed.

To redistribute both active and inactive routes, you must configure a route map with the inactive-path-additive rule and apply the route map to the redistribute command.

To redistribute active and inactive IPv4/IPv6 routes from other unicast protocols into BGP:

1. Configure a route-map to match the inactive-path-additive rule.

   route-map route-map-name
   match inactive-path-additive

2. Apply the route-map to the redistribute command.

   redistribute {connected [route-map map-name] | imported-bgp-routes {vrf vrf-name} [route-map map-name] | ospf process-id [route-map map-name] | static [route-map map-name] | l2vpn evpn [route-map map-name]}