[c-nsp] 3750/3750E stack upgrade downtime?

[Dirk-Jan van Helmond]

I'm also interested in this question.

We're thinking about getting some Cisco CBS 3110 blade switches to  
aggeregate the interfaces from the bladeservers. The CBS3110 can stack  
and is factually just an 3750 in a blade enclosure and has the same  
roadmap as the 3750.
I would very much like to have ISSU on these switches, otherwise an  
IOS upgrade means downtime for an entire bladechassis, which is  
unacceptable.
Unfortunately ISSU is not supported and not on the roadmap :(

I've asked my accountmanager @Cisco, so you please ask yours. Maybe if  
we ask kind enough, they will think about it ;)


regards,
Dirk-Jan





On Mar 30, 2009, at 22:45 , Peter Rathlev wrote:

> On Mon, 2009-03-30 at 16:20 -0400, Jeff Kell wrote:
>> Is there any way to "roll" an upgrade out to a 3750 stack without
>> abruptly rebooting the entire stack?
>
> I would very much like to know if there is. AFAIK you can't complete  
> the
> upgrade without downtime. Two switches with even just rebuild version
> differences can't live together in the same stack, so there's no  
> chance
> of upgrading without significant downtime.
>
> We're starting to use 3750E with 10G trunks in between them instead of
> Stackwise. This makes it possible to upgrade practically without
> downtime.
>
> Regards,
> Peter
>
>
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