Whats so difficult about ISSU

Thu Nov 8 23:38:27 UTC 2012

Cisco Nexus platform does it pretty well so they have achieved it. 

Zaid

On Nov 8, 2012, at 3:22 PM, Kasper Adel wrote:

> Hello,
> 
> We've been hearing about ISSU for so many years and i didnt hear that any
> vendor was able to achieve it yet.
> 
> What is the technical reason behind that?
> 
> If i understand correctly, the way it will be done would be simply to have
> extra ASICs/HW to be able to build dual circuits accessing the same memory,
> and gracefully switch from one to another. Is that right?
> 
> Thanks,
> Kim