A. one can always find different providers. If you are trying to build something and you don't have the right tools then get new tools. If you can't afford multiple redundant links between pieces of your own AS and you want to use an upstream to provide this for you then you must pick a upstream that has a presence in each location. I think this is the fundamental element that Ralph has missed. B. He mentioned that one of the reasons he thought he needed to announce more specifics was in the event the link between the two cities. I'm pointing out that this is simply not a valid reason. On Sat, 27 Jul 2002, Brad Knowles wrote:
At 3:51 PM -0400 2002/07/27, C. Jon Larsen wrote:
But with only 1 ISP link in each city (1 upstream) if he ever loses the link between the two cities, he has a problem, as there is no way to transfer traffic bound for city1 that enters city2's connection, and vice versa.
I think he has already explained that it is not possible for him to buy bandwidth from both providers in both cities. Therefore, your proposed solution is impossible.
Again, one needs to engineer ones network to work around one's own failures. I.e. ask or expect don't push routes into other people's tables because you are too cheap to buy a backup pipe, or too lazy to config a gre tunnel.
IIRC, he has also already explained that he already has a backup pipe between the two sites. However, because he can't buy bandwidth from both providers in both cities, this obviously is only part of the equation.
-- C. Jon Larsen Chief Technology Officer, Richweb.com (804.307.6939) SMTP: jlarsen@richweb.com (http://richweb.com/cjl_pgp_pub_key.txt) Richweb.com: Designing Open Source Internet Business Solutions since 1995 Building Safe, Secure, Reliable Cisco-Powered Networks since 1995