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Posted by Jarek Jarzebowski on July 6, 2008, 4:22 am
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wrote:
> Hi all,
>
> I have AS and own PI prefixes. I have 2 BGP routers in different
> locations (A and B). Router A announces some prefixes and B announces
> another prefixes. Between routers A and B is iBGP session (direct
> leased link connecting those two routers).
>
> Now I have to launch third location C with another BGP router within
> same AS.
>
> Do I have to make full mesh iBGP connections between routers A,B and C
> (I mean dedicated direct links) or may I use some other techniques
> like tunnels, or whatever, to establish iBGP connections?
>
> Regards,
> Jarek
I have found there is something like:
neighbour allowas-in
in cisco's BGP configuration.
Now, the question is what is better?:
1. use neighbour allowas-in
2. use iBGP multihop option
3. (if possible) use some tunnel to interconnect routers within the
same AS
Regards,
Jarek
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