[c-nsp] Nexus 7000 - vPC during NX-OS upgrade (ISSU)

[Manu Chao]

Thanks for your answer Lincoln,

Just curious:

Because FPGA/EPLD **upgrade operation is a disruptive **operation, it is not
always possible to upgrade both software and firmware.
--> Do you think or may be do you know if it is an issue having an
up-to-date NX-OS 5.x with old EPLD release 4.x?


On Thu, Jan 27, 2011 at 11:21 PM, Lincoln Dale <ltd at cisco.com> wrote:

> On 27/01/2011, at 10:19 PM, Manu Chao wrote:
>
> > I need to upgrade (ISSU) multiples N7K Dual Supervisor running vPC
> domains
> > from NX-OS 4.2(6) to 5.1(1a).
>
> ISSU from 4.2(6) to 5.1(1a) is non-disruptive.  you should be able to
> upgrade with no disruption to service.
>
> having said that, always carefully read the release notes posted on
> cisco.com for a given release.
> it may be that an upgrade between two releases requires you to do
> something.
> e.g. see <
> http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/notes/51_nx-os_release_note.html#wp293013
> >
>
> you can certainly run vPC with one vPC peer switch being a different NX-OS
> release to the other vPC peer switch.
>
> On 27/01/2011, at 11:52 PM, Chris Evans wrote:
> > Cisco has advised us to not use issu when possible.. we have had a few
> weird
> > bugs from it after the fact..  we are running 4.2(4)..
>
> please send me details (off list) of who at "Cisco" that advised you of
> this.  its not accurate.
>
>
> On 28/01/2011, at 12:09 AM, Ryan West wrote:
> > I'm sure the release notes say it, but the 4.x to 5.x major requires a
> full reload.  I spent a lot of time tracking down a BPDU rate limiting issue
> only to find the customer had ISSU'd from 4 to 5 and did not reload.
>
> an upgrade from 4.2.x to 5.x does not require a reload.  my guess is that
> the release-notes were not followed as it does talk about some very specific
> things in upgrade/downgrade considerations.
>
>
> cheers,
>
> lincoln.
>
>