About the BGP peering sessions.

Shivani Joshi wrote:
> I had a question regarding the nature of the BGP peering sessions of
> the RRCs. Is there any place I can find accurate information about the
> way the different RRCs maintain their peering sessions; as in how many
> of the sessions are multi-hop BGP sessions and how many are direct
> link sessions etc?

Hi,

apart from RRC00 in Amsterdam, which only has multihop peerings, all the 
RRCs in the RIS project are located at internet exchange points and are 
directly connected to their peers over Ethernet.

> I was wondering about this since, there has been a paper (see below)
> published in 2002 that said that most of the RRCs peering sessions
> were multi-hop eBGP sessions and as a result the BGP data collected
> here cannnot be an accurate refelction of what goes on the actual
> Internet/backbone routers.

Actually, if you look at the peering statistics available on the DB 
status page:

http://www.ris.ripe.net/cgi-bin/rrcstatus.cgi

you will see that the multihop sessions on RRC00 only make up a small 
minority of RIS peerings.


Cheers,
Lorenzo