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

[joel jaeggli]

On 6/24/12 11:11 AM, Sascha Luck wrote:
> On Sun, Jun 24, 2012 at 10:37:22AM -0700, Joel jaeggli wrote:
>
>> extending the control-plane of an ethernet switch over tens of
>> kilometers is a imho a seriously bad idea.
>
> Why, actually? Latency issues?
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. 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.

> rgds,
> Sascha
>