dual Master same time 3 different stacks

[RAJA_RAMESH_JAM]

*00:04:96:82:4d:0b 1 Active Master CA-

00:04:96:82:4c:fd 2 Active Master CA-

00:04:96:7e:29:97 7 Active Standby CA-

00:04:96:7e:29:91 8 Active Standby CA-

00:04:96:97:77:35 3 Active Backup CA-

00:04:96:97:77:3c 4 Active Standby CA-

00:04:96:9c:44:cd 6 Active Standby CA-

Same issue happend 3 different DC's with 3 diffrent stacks and in same time, i cant be cabling, power for any.
Stacks running with ExtremeXOS version15.3.1.4

[Drew_C]

Please open a case with GTAC so they can continue to investigate this with Engineering.
-Drew

[Stephane_Grosj1]

We would need someone from GTAC that knows the bug number. I was able to find similar (old) feedback of a similar issue for other customers searching this community, but unfortunately I didn't see a tracking number (https://community.extremenetworks.com/extreme/topics/xos-12-6-1-3-stack-crashes-after-1555-days-upti...). 1555 days of uptime then the bug bringing dual Master state.

[RAJA_RAMESH_JAM]

Thank you Stephane, is there any article, available so that will get business approvals for down time

[Stephane_Grosj1]

I believe you are hitting a known issue at around 1500 days of uptime, where the Master and Backup do not see each other and you have a dual Master happening. That has been fixed for a long time, but I assume not in your current release (upgrade to the latest). A reboot would solve that for another 4 years...