[nsp] 5 9's infrastructure, stateful failover

[Tomas Daniska]

<snip>
> design) Generally, Layer-2 Ethernet technologies (I.e. 
> spanning tree) can't 
> do fast failover - even if you have a relatively small 
> network diameter and 
> tweak the timers you'd still expect 30s convergence times for 
> each flap. 
> For critical networks, try to push L3 to the edge as far as 
> possible and 
> have a STP-free dual L2 core. You need to make sure servers 
> are built in 
</snip>

yes, this used to be true until last year. there is a magic little
thingie out there, called rapid spaning tree protocol

find out @cco, works *great*


deploy it well and it also is magic in production, of course :)

--

deejay