Dean,
[EMAIL PROTECTED] (Dean Anderson) wrote:
> If Av8 turns on PPLB, traffic to F-root will go through both sprint and
> att on a per-packet basis. However F-root is really anycasted, so it looks
> really like this:
>
> Av8
>
> / \
> sprint att
> | | | |
> ,----+--+--. ,--+--+----.
> | router 1 | | router 2 | ...
> `--+-------' `-------+--'
> | |
> ,--+-------. ,-------+--.
> | switch 1 +------------+ switch 2 | ...
> `-+------+-' `-+------+-'
> | | | |
> ,------+-. ,-+------. ,------+-. ,-+------.
> | f-root1| | host 2 | | f-root3| | host 4 | ...
> `--------' `--------' `--------' `--------'
>
> So, we see that some packets will go to f-root1 and some packets will go
> to f-root3, on a per-packet basis.
This would mean an overly simple setup at the F-Root site, and would
sacrifice stability and consistency for availability. It will work
for most situations in the Internet, but not for all. Without a real
load-balancing solution, you're in deep sh*t, certainly. To get the
setup consistent in host-server associations, you need a clustered
or SPOF (with hot-standby of course) solution.
YMMV,
Elmar.
--
"Begehe nur nicht den Fehler, Meinung durch Sachverstand zu substituieren."
(PLemken, <[EMAIL PROTECTED]>)
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