I'm not sure if this is a BGP issue or whatnot, but we have a section of our network that joins 2 area 0 OSPF networks together via iBGP route redistribution on both sides (they are physically connected over a wireless ptp link)
I have MPLS and VPLS running in many areas of our network without an issue. However in this case they simply will not connect to each other
- I have set the transport address to the loopback IP's (same as everywhere else in the network)
- I have triple checked that MTU is fine along the path (capable of 9600 between them)
- Both routers can see each others loopbacks in their routing tables
- Both routers can ping each others loopbacks, 1 total hop
- The MPLS LDP neighbor state goes to DOT
- The loopback addresses or any other remote addresses do not appear in the MPLS forwarding table
- I cannot establish a VPLS tunnel between these 2 routers (there are no other routers between them)
- Both routers have no firewall rules at all
If I change the LSR transport address to the interface IP instead of the loopback IP on both sides, and also change the remote IP of the VPLS tunnel to the other sides interface IP it works. But this is not a solution. I don't need VPLS between these 2 routers, I actually need VPLS between 2 much further away routers, but this link is the problem that I need to solve first
Is iBGP the problem here or something else?