[j-nsp] Procedure for upgrade routing engines.

[Misak Khachatryan]

Maybe they assuming that GRS/NSR is enabled?

Daniel Roesen wrote:
> On Wed, Jan 08, 2014 at 01:56:16PM +0100, Daniel Roesen wrote:
>> On Wed, Jan 08, 2014 at 01:27:57PM +0100, Jonas Frey (Probe Networks) wrote:
>>> RE-S-1800 is running JunOS 64, so this will *not* work.
>>>
>>> Mixing routing engines isnt recommended/supported officially by juniper
>>> either, but works to some degree (RE1300/RE2000 32bit).
>>
>> Without having GRES/NSR enabled, I see no reason why it shouldn't work.
>
> BTW, just found that little remark at the end of
> http://www.juniper.net/techpubs/en_US/release-independent/junos/topics/reference/specifications/routing-engine-m-mx-t-series-specifications-by-model.html
>
> "On routing platforms that accept two Routing Engines, you cannot mix
> Routing Engine types except for a brief period (one minute or so) during
> an upgrade or downgrade to two Routing Engines of the same type."
>
> I have no idea what to make out of this fuzzy comment. "one minute or
> so" is not a reasonable time frame for any upgrade action as this is not
> enough time to boot it up, wait for it to settle, perform health checks,
> switch over to it, let the dust settle down and replace the formely
> active, old RE too.
>
> Perhaps some JNPR folks can chime in with actual technical facts and
> details?
>
> Best regards,
> Daniel
>

-- 
Best regards,
Misak Khachatryan,
Head of Network Administration
and Monitoring Department,
GNC-Alfa CJSC.