What is "real v6 deployment" ?
Jim Fleming
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-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Randy Bush
Sent: Sunday, June 03, 2001 8:47 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: DNS query over anycast
> "There is little experience with widespread, arbitrary use of internet
> anycast addresses
actually, there is a fair bit of experience with it.
as far as i can tell, the base problem here is that folk who have had no
experience with v4 anycast service deployment know in theory or in vitro
that there can be problems in some circumstances, namely non-ephemeral tcp
sessions finding themselves connected to the wrong host due to routing
changes [0].
unfortunately, the result has been outlawing a whole bunch of stuff which
can not exhibit this kind of problem, namely udp based anycast services,
and outlawing tcp services which may not be as susceptable to the problem
about which they seem to be worried.
this is unfortunate as we have real services widely deployed in v4 anycast
which will now be a pain in v6. yet another thorn we ourselves place in
the side of real v6 deployment.
randy
---
[0] - in fact, in real deployment, long lived tcp to a v4 anycast seems
more stable than even optimism would seem to warrant. research
continues.
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