[j-nsp] MX VC ISSU

[Scott Harvanek]

Morgan,

Yea, we've successfully done this in the lab with the MXs and breaking 
the VC.  I guess it's better than nothing.  The VC setup on the MXs and 
NSR/Graceful failover is pretty awesome and I don't want to abandon VC 
just because of this and at the same time don't want to wait to deploy 
this cluster until 14.X is stable and ISSU is available.

Ugh, decisions.

Scott H.

On 4/24/14, 3:42 PM, Morgan McLean wrote:
> 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 <mailto: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
>             <mailto: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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