> This reminds me of the current flap over flu vaccinations. The entire > U.S. supply of flu vaccines from 2 vendors. 1 vendor (an overseas > vendor at that) in the UK gets closed down and mayhem ensues. Somebody > should be fired for this dumb decision.defense
I think a better analogy would be: Take two flu vaccines with different properties from two vendors. If the flu gets through one line of defense hopefully it won't get through the second. To be Highly Available you must be redundant AND diverse. I learned this the hard way as I watched a bug in my software propagate to 17 "redundant" servers, taking them all down one by one. In my opinion this is were a lot of hosting companies go wrong. They claim high availability w/out diversity, but my experience has shown that this isn't possible. Most of the time you can't afford diversity, but in the networking world, with open standards, you can. This is exactly how the root nameservers are run. If I was a big customer (say AT&T) I wouldn't accept HSRP from Cisco as a HA solution for this reason. I would insist that they interoperate with other vendor's routers. _______________________________________________ RLUG mailing list [EMAIL PROTECTED] http://lists.rlug.org/mailman/listinfo/rlug
