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. -- Brad Knowles, <brad.knowles@skynet.be> "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania.