>Also, the DNS method will suffer from the same problem. Have you >figured out a way to detect an upstream failure and switch the DNS table?
The f5 LinkController does "health checks" to a list of user-configured Internet sites via ICMP, TCP or what have you. It monitors connectivity and latency. If connectivity to those sites dies or latency rises beyond a certain threshold, and similar health checks on the secondary link produce better results, the switch occurs. No BGP routes are necessary, and the changeover happens proactively. I've done my share of TCP programming, and I think the same effect could be accomplished without much effort using a Perl script. _______________________________________________ RLUG mailing list [EMAIL PROTECTED] http://www.rlug.org/mailman/listinfo/rlug
