[c-nsp] High CPU ME3600-X

[Jason Lixfeld]

On 2013-01-28, at 11:35 AM, Saku Ytti <saku at ytti.fi> wrote:

> On (2013-01-28 11:07 -0500), Jason Lixfeld wrote:
> 
>>> We find that a planned outage, with advance customer warning, works
>>> just fine. YMMV.
>> 
>> This is 2013.  If this was 1998, I'd agree with your disagreement.
> 
> In which platform does ISSU work reliably? At least we and I know several
> others have banned ISSU in their MX routers as it is source of many dodgy
> issues.
> In CAT4500 switches I hear it works quite well.
> 
> But even when it does work, ISSU often means seconds of outage, this is not
> something we can do without maintenance window announcement anyhow, so it's
> rather unclear what exactly are the benefits.
> If it would be sub 50ms and it would work reliably, I'd love to use it.

ISSU is never something I'd do in the middle of the day; always in a window.  That said, sure, sub 50ms would be amazing.  Until such a day, my customers and I would gladly accept many seconds of outage (ISSU), more frequently, as opposed to many minutes of outage less frequently (reboot).