CCNP - BGP - Packetracer limitations?

Hi Everyone,
I'm trying to figure out if I am doing something wrong, or if this is a Packettracer limitation: I believe that I read that BGP neighbors do not have to belong in the same subnet, however, in Packettracer will not form an adjacent neighbor unless the BGP routers are in the same subnet. Am I doing something wrong?

Thanks!

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Comments

fredrikjj

That depends. It could be a Packttracer limitation, but it could also be you not fully understanding how BGP's TCP session works.

networker050184

I think fredrikjj hit it on the head with the TCP session part.

Heero

That being said, if you are at the CCNP level and doing BGP labs, you should step your game up and use something like GNS3, or VIRL, or CSR1000Vs, or IOU.

Node Man

One reason I love this forum is its proactive attitude. We clearly have already upgraded to protocol ToughLove V2.

I'll will take the advice above. Loading up GNS3

Fitzi

I'm not sure about packet tracer as I have never used it but to give another hint, as the other guys have alluded to, have a think about reachability between your two bgp speakers.

_Gonzalo_

Node Man wrote: »

I believe that I read that BGP neighbors do not have to belong in the same subnet,

Firstly, I agree with you upgrading to GNS3 or similar. It is tough to let packet tracert go, but you really have no choice, as for advanced routing and high availavility (to give you two examples) you can´t use it.

And now, about your question, routing goes after connectivity. No connectivity, no routing. That said, in BGP there is no need for two routers to be directly connected to be neighbors, as you can set the hops needed to reach the neighbor that you defined.

Hope it helped!

Hondabuff

You can use the "neighbor ip-address ebgp-mutihop number-of-hops command" Used for peering to loopback addresses. If connecting to a loopback address with the neighbor ip-address update-sourceinterface command. The dumb things you remember while doing NP studies.

Node Man

Hi Guys,
Thank for the good advice. Here were the steps I took:

1) used GNS2
2) watched some youtube videos
3) found my major snag: properly setting up the "ip route" command:
ip route 1.1.1.1 255.255.255.255 10.10.10.2

I got the loopback working. Now I am going to wash - rinse - repeat a few more times.

Thanks again!