[j-nsp] EX4200 Virtual Chassis Uplink Requirements - Extended VCT / VCCP

[Sascha Luck]

On Sun, Jun 24, 2012 at 01:47:43PM -0700, joel jaeggli wrote:

>Latency is a consideration given your control-plane is not 
>distributed. What happens when it gets partitioned is a bigger issue. 
>That is a problem when they're all in the same  rack and there's a 
>ring of stacking cables, it's a bigger problem at considerable 
>remove.

Partitioning is a problem, but I'd likely provision the remote 
switches in the line card role. If the WAN links get interrupted,
you'll lose the remote bit but you would have anyway. 
(I actually have a requirement for this setup, but at least it is
in the same city...)

>finally while your  mtbf is about the same for 8 seperate 
>switches vs 8 in a stack the impact on overall availability due to 
>stack failure is much greater.

Only if the entire stack fails - this should not be the case in an
EX VC setup - I've had single switches fail but the rest of the stack 
kept pushing traffic.

rgds,
Sascha