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Re: IP failover/migration question.
- From: Edward B. DREGER
- Date: Sun Jun 11 23:30:47 2006
RB> Date: Sun, 11 Jun 2006 17:02:14 -1000
RB> From: Randy Bush
RB> persistent tcp connections from clients would not fare well unless
RB> you actually did the hacks to migrate the sessions, i.e. tcp serial
RB> numbers and all the rest of the tcp state. hard to do.
Actually, the TCP goo isn't too terribly difficult [when one has kernel
source]. What's tricky is (1) handling splits, and (2) ensuring that
the app is consistent and deterministic.
One transit provider handling multiple locations shouldn't present a
problem. Of course many things that should be, aren't.
== below respsonses are general, not re Randy's post ==
Note also that redundancy/propagation is at odds with RTT latency. The
proof of this is left as an exercise for the reader.
Finally, an internal network between locations is a good thing. (Hint:
compare internal convergence times with global ones.)
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