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

[Catalin Dominte]

If you only have 2 members 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.


Catalin Dominte | Senior Network Consultant
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On 25 Jul 2018, 08:27 +0100, Victor Sudakov <vas at mpeks.tomsk.su>, wrote:
> Dear Colleagues,
>
> I've encountered an odd problem with adding EX4200s (running 12.3R6.6)
> to Virtual Chassis with a nonprovisioned configuration file.
>
> According to documentation, I zeroize the second switch, power it off,
> connect to the running switch and power it on. Some magic happens, and
> voila:
>
> > show virtual-chassis
>
> Virtual Chassis ID: 915f.3bb3.ff60
> Virtual Chassis Mode: Enabled
> Mstr Mixed Neighbor List
> Member ID Status Serial No Model prio Role Mode ID Interface
> 0 (FPC 0) Prsnt BM0213317561 ex4200-24t 128 Master* N 1 vcp-0
> 1 (FPC 1) Prsnt BM0217040019 ex4200-24t 128 Backup N 0 vcp-0
>
> Member ID for next new member: 2 (FPC 2)
>
> Looks fine, doesn't it? However, if I later poweroff the Backup switch
> (BM0217040019), the current Master switch (BM0213317561) goes into linecard (sic!)
> mode! And I lose ssh access to it. I can undo the disaster only from the
> serial console.
>
> What am I doing wrong? Or if it's a bug, is there a workaround?
>
> --
> Victor Sudakov, VAS4-RIPE, VAS47-RIPN
> AS43859
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