Considered options 1 and 2 but was looking for a way to keep Peering happening strictly between the edge and cores. #3 did exactly that, thanks!
Chris Wright Network Administrator From: Eric Flanery [mailto:[email protected]] Sent: Friday, January 27, 2017 11:30 AM To: Chris Wright; Mikrotik Users Subject: RE: OSPF & BGP If Core1 is IP routing the packets, then it needs an IP route to the destination. Recursive lookup does not alter the packets, so the OSPF routes on Core1 don't help. Three quick ways to make this work: 1. Enable reflection on Edge, and make Core1 and Core2 reflector clients, and make sure Edge doesn't set next-hop-self. This will cause Core1 and Core2 to receive each other's routes by way of their sessions to Edge. 2. Setup an iBGP session between Core1 and Core2. They will then receive each other's routes directly. 3. Enable LDP on the interfaces used for OSPF. This will avoid an IP lookup on Core1, forwarding via MPLS labels instead. What will be best for you depends on what you are trying to accomplish. --Eric From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Chris Wright via Mikrotik-users Sent: Friday, January 27, 2017 11:13 AM To: Mikrotik Users Subject: [Mikrotik Users] OSPF & BGP I'm poking at getting BGP on top of OSPF running so I can connect BGP peers using their loopback addresses and running into what seems to be a small hiccup with my lab. Three routers in a line. Cores 1 and 2 are BGP peered to the Edge loopback, all in the same AS. Edge Core1 Core2 10.255.255.1/32 (O) 10.255.255.2/32 (O) 10.255.255.3/32 (O) 10.10.0.1/24 (BGP) 10.10.1.1/24 (BGP) 10.10.2.1/24 (BGP) All three routers can ping each other's loopback address. BGP routes are being advertised and received. My problem is that although the Edge has a BGP route for 10.10.2.0/24 recursive via 10.255.255.3, it gets stuck in a routing loop between itself and Core1. Core 1 does not have a route for 10.10.2.0/24 because it is not BGP peered with Core2. Must it be? Chris Wright Network Administrator
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