[dns-operations] Quick anycast primer
igor at gashinsky.net
Fri Jul 14 19:16:28 UTC 2006
:: For instance, you are a very large provider who spans the globe. You
:: see several instances of an anycast NS called XYZ.ns.
:: You are personally sitting in Washington DC. Your network peers with
:: providers announcing XYZ.ns in DC, London, NYC, SJC, Tokyo, etc. But
:: it turns out the guy in Tokyo has the lowest IP address, and
:: therefore won the tie-breaker since the AS_Path Length was the same
:: to all the instances.
Uhm, what gear do you use that doesn't do "Closest IGP metric to BGP
next-hop" before "Lowest RID" during the best-path selection? Obviously,
your topology may be different then mine, and if you send different
MEDs that would cause a simmilar scenario to the one you mentioned, but
then it was *your* decision to do so.. As I said, YMMV, but it works
rather well for me (and a few million of my users)...
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