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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical anycast DNS (Re: Internet vulnerabilities)
ME> Date: Fri, 05 Jul 2002 09:05:44 -0400 ME> From: Marshall Eubanks ME> - it's static - no failover. If AS 701 and AS 1239 are both ME> announcing a route to foo, and your preferred route is ME> "through" AS701, and the AS701 foo goes down, then you do not ME> automatically switch over to the AS1239 foo, even if you ME> could reach it. ??? ME> - there is no way to have multiple anycast addresses within ME> an AS ??? ME> - load balancing is tough Just as tough as load-balancing over different upstreams in a multihomed network. That's all anycast really is: multihoming with the added twist of using multiple, separate systems instead of one. Each system has a unique, non-anycast IP address bound as the primary IP, allowing communication between the disjoint parts. Secondary IP(s) live(s) in the anycast range, and is/are routed appropriately. You can bind the appropriate 192.175.48/24 addresses to your NSen and run an authoritative copy of the root TLD. IIRC, Paul even mentioned doing this a few weeks ago... I believe the thread was on dynamic DNS updates and Win2000's broken implementation. Think of anycast as DDoS in reverse: Instead of distributed traffic sources, one has distributed traffic sinks. Hence the attractiveness in surviving DDos attacks. 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Date: Mon, 21 May 2001 11:23:58 +0000 (GMT) From: A Trap <[email protected]> To: [email protected] Subject: Please ignore this portion of my mail signature. These last few lines are a trap for address-harvesting spambots. Do NOT send mail to <[email protected]>, or you are likely to be blocked.
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