Depends on their transit agreements. That's how BGP works..... If a route is known via several different paths, it is possible to route traffic around devices that are having problems. When setting up a partial mesh though, it is also extremely easy to introdue routing "blackholes" inadvertently.

-----Original Message----- From: Alastair Johnson [mailto:alastair.johnson(a)maxnet.co.nz] Sent: Friday, 8 October 2004 2:29 p.m. To: nznog(a)list.waikato.ac.nz Subject: RE: [nznog] Ameritrade.com smtp server issue

That doesn't make sense. Savvis should not be routing between Sprintlink and UUNET. That would be a major filter failure, and cause massive issues.