06-05-2009 12:33 PM - edited 03-04-2019 05:00 AM
All,
I have a small topology:
RouterA(AS1) -> RouterB(AS2) -> RouterC(AS2) -> RouterD(AS3)
RouterB learns of networks from RouterA, but it doesn't send these networks to RouterC with synchronization turned on.
If I turn synchronization off, then I get the routes to RouterB. I'm trying to mimic the example at:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800c95bb.shtml#synch
It doesn't seem like it's working correctly though. What I have is the following:
RouterA:
networks 1.1.1.0/24 2.2.2.0/24
RouterB:
networks 3.3.3.0/24
Sees all of RouterA's networks: 1.1.1.0/24 and 2.2.2.0/24
RouterC:
networks 4.4.4.0/24
with sync turned on, it doesn't even get RouterB's 3.3.3.0/24 network. Turn sync off, I get RouterA and RouterB's networks
RouterD:
network 5.5.5.5/32
Thanks,
John
06-05-2009 12:53 PM
Okay, so the problem is fixed. Apparently, because I only have two routers using iBGP, the router knows this and doesn't propagate the route to the "last" router in iBGP.(If anyone can verify this I'd appreciate it.)
I created an eigrp process on RouterB and RouterC, and I redistributed bgp into eigrp on RouterB. RouterC got all of the routes as external eigrp routes, and then RouterD got all of the routes as BGP routes.
John
06-05-2009 01:32 PM
John
I was going to explain IGBP synchronisation but a quick check showed this was already covered in one of your other threads. So i'm assuming you are asking something slightly different here ?
Not sure exactly what it is tho :-) Could you perhaps clarify ?
Jon
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