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How do I redistribute Ibgp routes into OSPF?
On Nexus platform, when redistribution from BGP to OSPF protocol is done, by default only EBGP routes are redistributed. In order to redistribute the Internal BGP routes a route-map needs to be configured and applied in redistribute command under OSPF configuration.
When should I use OSPF?
OSPF is primarily used for internal routing because it’s a link-state routing protocol. OSPF is based on Dijkstra’s algorithm for finding shortest paths between two points.
Can You redistribute BGP route into OSPF?
This usually required where BGP peers are separated by certain number of hops that aren’t participating in BGP — so they don’t know the route to the destination network that is advertised by BGP. In Cisco IOS router, we can redistribute either one or both external and internal BGP into any IGP, such as OSPF.
Where can I find a network diagram for OSPF?
The network diagram applies to the first three cases. The diagram and setup for the fourth case can be found in the Redistribution of OSPF NSSA-External Routes into BGP section. If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default.
When is an OSPF route flagged as O?
Intra-Area—In a multiarea OSPF network, routes, originated within an area, are known by the routers in the same area as Intra-Area routes. These routes are flagged as O in the show ip route command output.. Inter-Area—When a route crosses an OSPF Area Border Router (ABR), the route is known as an OSPF Inter-Area route.
How does OSPF redistribution work on Cisco routers?
This Tech Note explains the behavior of Open Shortest Path First (OSPF) to Border Gateway Protocol (BGP) redistribution on Cisco routers. The behavior of OSPF to BGP redistribution is outlined in RFC 1403 . There are several types of OSPF routes: