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Le 08-09-03 à 19:26, [EMAIL PROTECTED] a écrit :
OK, I'm looking at this, and having a *little* trouble buying that
there's
exactly zero or one p2p links - consider the case where the last
'c2p' link
is to provider A, who peers with B but not C, and B peers with both
A and C,
and the first p2c link lands at C. Don't you end up with "cp2 p2p
p2p p2c" in
that case? Or is there a convention saying we compress the A-B and
B-C
links into a notational A-C link? Or are we defining A-B or B-C
links as
being a c2p type instead, even though they're peering and not transit?
If B passes along C's routes to A then that is not (in the model) a
peering
relationship. Only your own and your customers' routes get sent to
peers not
routes learned from other peers.
So in this case B-C looks like p2c and A-B could be either p2p or c2p.
Cases of partial transit, where B might repeat C's routes to peers but
not
to upstrem providers are not, AFAIK treated in the model.
Cheers,
- -w
- --
William Waites <[EMAIL PROTECTED]>
http://www.irl.styx.org/ +49 30 8894 9942
CD70 0498 8AE4 36EA 1CD7 281C 427A 3F36 2130 E9F5
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