Have the customer run iBGP between their two routers, with a static
route on each end pointing to the other end via your network.
There are more complex ways to address this problem with more graceful
failovers; does the customer have another upstream besides you?
---Rob
Nick Kraal <nick@arc.net.my> writes:
> We have a customer that has transit services from us. They have split their
> network into two /19 and run BGP with us at two different locations. Each
> /19 is actually for two seperate businesses; one a tier-2 ISP and the other
> VoIP provider. Two physically sperate networks are also running the same ASN
> and are to peer with each other via our network. There is no internal
> interconnectivity between them or any IGP running.
>
> The problem lies in that to reach each other they need to 'transit' via our
> network and according to BGP, one cannot announce back the client prefixes
> learnt from the other network and vice versa as both of them are running the
> same ASN. This is to prevent routing loops.
>
> In this case is there a method to overwrite this so that the first /19
> network will be able to reach the second /19 network via ours?
>
> Thanks in advance.
>
> -nick/
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:00 EDT