[157795] in North American Network Operators' Group
Re: Whats so difficult about ISSU
daemon@ATHENA.MIT.EDU (Zaid Ali)
Thu Nov 8 18:38:46 2012
From: Zaid Ali <zaid@zaidali.com>
In-Reply-To: <CALb2afM1G1KHRMWM7PE0XUYdtJscD319_LhSxBJxkCxZs3aDZg@mail.gmail.com>
Date: Thu, 8 Nov 2012 15:38:27 -0800
To: Kasper Adel <karim.adel@gmail.com>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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
