Unless useful to others, feel free to just reply off-list. Background: Tuesday (yesterday) morning around 1am, I got a phone call from one of my transit customers(which seems more like a dream). I, sadly, didn't have the router they are on logging to a server, so it's impossible for me to see exactly what happened. Here's what I have. They received a minor spike in traffic going to them. My router shows the last BGP peer reset about that time, so this could be me sending the global table. His bandwidth then drops to 0 for almost exactly 30 minutes (MRTG isn't an exactly graph). My guess (authoratative answer) was the customer flapped their routes once too many times and was suppressed by both of my providers, as I seem to recall the penalty heal rate is in 30 minute increments. First issue is, am I right? If I am, then I need to develop ways to limit the damage done to my customer. Is there a way to setup route supression just under what most people use so that I can have client fix the problem and then clear the suppress on my network to allow them to come back up immediately just under the suppress threshold? Another possibility, although I've not seen reference to it, since the customer only transits through my network and depends on my redundancy, is it possible to hold his routes in the tables and keep advertising them out unless they are down for a set time period (ie, ignore flaps, but drop them if he's down 15-30 minutes)? I've never seen this issue. I was aware supression was possible when I first started learning BGP, and so I have never risked bouncing my peers more than three times in a day, and at that point usually quit playing until the next week. When my peers flap due to DDOS attacks, BGP never stabalizes fully or my providers have protected my networks (though I haven't seen how 69.8/18 will react in this scenario which doesn't have a shorter prefix at the peer). My customer is thinking of multi-homing again after this. Of course, it wouldn't have saved the customer. The reason they left multi-homing is that their network is in the same building and they only have one BGP router. I don't think multiple paths would have saved them. Opinions? Suggestions? Options? -Jack ~We now return you to the 69/8 threads