[j-nsp] EX4200 virtual chassis problem, master going into linecard mode

[Victor Sudakov]

Victor Sudakov wrote:
> Pavel Lunin wrote:
> > > > in a virtual chassis you could add:
> > > >
> > > > set virtual-chassis no-split-detection
> > > >
> > > > This will ensure that if both VC ports go down, the master routing
> > > engine carries on working.
> > >
> > > Are you referring to "Scenario B" in
> > > https://kb.juniper.net/InfoCenter/index?page=content&id=KB13879 ?
> > > or a different case?
> > >
> > 
> > 
> > I don't like to explain what others say but I think yes. It's been known
> > behavior since always: in a two-member VC always disable split-detection.
> > You can google for other threads on this in this list.
> > 
> > It's always been kind of poorly documented. Last time I checked the docs,
> > instead of just writing clearly that it must be disabled in two-members
> > mode, they "don't recommend" it with some kind of hand-waving explanation
> > that if you estimate that the backup RE failure probability is higher that
> > a split-brain condition blah-blah-blah... Just disable split-detection,
> > that's it :)
> 
> Tomorrow we are planning a lab with and without split-detection. I
> hope this solves the issue for us, and if it does, I'm sure to make a
> note in my engineering journal.

Yes, no-split-detection did help. 

Thank you Catalin and Pavel very much again.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
AS43859