[j-nsp] MX VC ISSU

[Morgan McLean]

People get into these kind of situations on the SRX's as well. I've done
things where I upgrade one of the SRX's and bring it back, however the
cluster isn't happy because the version is mismatched. However, when I pull
the remaining working SRX out of the cluster, the other one takes back over
because it has no choice. You can't fail it over manually, but in a
downtime situation it will still take over.

Similarly, as a hack, until ISSU is available couldn't you admin down all
ports on MX-A, upgrade its software, reboot it, disconnect the VC ports
causing a split brain setup, it will come up thinking its master since the
other member is lost, and then enable its ports. At the same time you would
have to admin down all the ports on MX-B, so that you can upgrade the
software and zeroize and set VC ports it so that it slaves config info
initially from MX-A and rejoins the VC?

Its a hack, and it will probably cause a blip of downtime but at least
you'll have one working MX at all times basically. Ideally you'd only have
to do that dance once, assuming ISSU works as expected (I've heard a lot of
horror stories).

Thanks,
Morgan


On Wed, Apr 23, 2014 at 2:48 PM, Scott Harvanek <scott.harvanek at login.com>wrote:

> Okay so then here's the million dollar question.  Has anyone attempted a
> ISSU on a MX VC?
>
> I've got some 480s in the lab in pre-deployment state and the question is,
> go VC and suffer a complete outage when a upgrade is due or leave them
> non-VC.  I'm not comfortable running 14.1 out of the gate but I also like
> the redundancy of the VC.
>
> Scott H.
>
>
> On 4/23/14, 10:40 AM, JP Velders wrote:
>
>> Date: Thu, 17 Apr 2014 18:45:33 -0400
>>> From: Scott Harvanek <scott.harvanek at login.com>
>>> Subject: [j-nsp] MX VC ISSU
>>> Does anyone know if ISSU will ever be supported on a MX virtual-chassis?
>>>
>> I believe it's on the roadmap and supposed to become available in 14.1.
>>
>> Kind regards,
>> JP Velders
>>
>
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