nanog mailing list archives

Re: IPv6 Deployment for the LAN


From: Perry Lorier <perry () coders net>
Date: Fri, 23 Oct 2009 13:00:35 +1300

trejrco () gmail com wrote:
WRT "Anycast DNS"; Perhaps a special-case of ULA, FD00::53?
You want to allow for more than one for obvious fault isolation and load balancing reasons. The draft suggested using <prefix>:FFFF::1 I personally would suggest getting a well known ULA-C allocation assigned to IANA, then use <prefix>::<protocol assignment>:1 <prefix>::<protocol assignment>:2 and <prefix>::<protocol assignment>:3, where <protocol assignment> could be "0035" for DNS, and "007b" for NTP, and if you're feeling adventurous you could use "0019" for outgoing SMTP relay.



... Heck, start a registry (@IANA) and add in FD00::101, etc. ... Maybe reserve FD00::/96 for this type of "ULA port-based 
anycast allocation". (16bits would only reach 9999 w/o hex-conversion (if hex-converted could reserve FD00::/112 ... But 
would be less obvious))


Easily identified, not globally routable, can be pre-programmed in implementations/applications ... ?


Exactly, seems easy, straight forward, robust, reliable and allows for things like fate sharing and fail over.


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