CLM> Date: Thu, 18 Sep 2003 05:28:05 +0000 (GMT) CLM> From: Christopher L. Morrow CLM> Just because they hosts are on the same subnet and are CLM> apparently behind the same end device for you doesn't make CLM> them non-geographically diverse if they are really anycast CLM> pods, does it? It really just means one anycast pod was down CLM> for a time :( Ideally, though, an anycast node should yank the route if the service in question dies. I say "ideally" because we still haven't had DNS properly make friends with BGP... and such flaps really shouldn't be seen, which means having a contiguous internal network and [properly] decoupling IGP from EGP... ...and suddenly I'm making many assumptions. ;-) CLM> It is one of the things that anycast makes difficult though CLM> :( Troubleshooting anycast from the outside is a bear. It's a lot like multihoming, only with different geography. Unicast IP addresses are analogous to world-facing router interfaces. Tip for anyone considering playing with anycast, particularly on the same ethernet segment: Bind the anycast IP addresses to your loopback interface. Eddy -- Brotsman & Dreger, Inc. - EverQuick Internet Division Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita _________________________________________________________________ DO NOT send mail to the following addresses : blacklist@brics.com -or- alfra@intc.net -or- curbjmp@intc.net Sending mail to spambait addresses is a great way to get blocked.