Guys,
Haven't posted for a while as I've been immersing myself in labs. The fun of
IPv6, Multicast and MPLS :) but I'm getting there.
Back to point, I was doing a lab where I had some eBGP peers that were multiple
hops apart. When I configured everything up I forgot to add the eBGP multihop
command. After some troubleshooting I figured out my school boy error but it
sparked a question.
Scenario is that you have peers multi hops away, but you have no visibility of
the internetwork connecting them. So you dont know how many hops there are i.e.
traceroute doesnt work. When you use the show ip bgp neighbours command it
tells you that the peer is multi hops away, but doesnt give more info.
Is there a debug that gives you info on what to set the TTL to? I know the lazy
answer is just to use 255 in the multihop command, but what if we want to be
very specific. TTL Boundary esque !?
If the peer is 5 hops away but I set my multihop command to 4 my peering wont
come up!? so again, is there a debug to give me a helpful hint?
Cheers
Bal
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