[c-nsp] bgp transit, selecting providers based on source IP

[Bruce Pinsky]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Michael K. Smith - Adhost wrote:

...snip...snip...

> 
> The answer to this may be "no way".  :-)  If you have a peering session
> with the customer, why not only announce your routes from your two other
> providers so that the customer doesn't see the routes from the one they
> want to avoid?  Wouldn't that accomplish the same thing?  You could tag
> your transit routes with a community, add the two you want to transit to
> a community-list and then announce only the routes that match the list.
> 
> Thinking out loud, but not necessarily well.  :-)
> 

And when the packets reach his routers that have all 3 provider exit points
available, how is he going to prevent those packets from choosing the
"undesired" exit point?

It's not a question of what he advertises to his customer, but rather how
the forwarding decision is modified for just this customer.

- --
=========
bep

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFH6rJdE1XcgMgrtyYRAqiUAJ9WrZEqdo3wvfHIECABL/1lumg4gACgvb2F
0ohoY6gFi5RWdjyEv86KT7Y=
=2oTl
-----END PGP SIGNATURE-----