BGP confederation prefix behaviour = IBGP ?

From: Koen Peetermans (K.Peetermans@chello.be)
Date: Sun Jul 11 2004 - 12:11:24 GMT-3

Hi,

I was wondering about BGP confederation functionality which I experienced on
an IEWB lab (#8) :

Is it true that Confederation peers in different Sub-as'es only will forward
the best prefix to eachother (like IBGP) ?

For example :

AS54 AS54
| |
EBGP EBGP
| |
CONF AS100 CONF AS100
Sub-AS 65267 - Sub-as 65038 - Sub-as65145

Sub-as 65038 will get the same BGP prefixes from both
65267 & 65145, but with different next-hops to AS54.

However, it will select only the best path for a prefix and only send that
further to the next sub-as ? Is this correct behaviour ?
I check Internet Routing Architectures and Routing TCP/IP VOL II but didn't
find something describing this (maybe didn't look good enough).

Thanks and kind regards,

Koen.

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