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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