Interface starts flapping when added as Stacking Port

[florian_willeke]

Hey everybody!

i am currently very lost setting up a switch stack of 2 ICX7850-32Qs. 

We are using 2 of them and are connecting them via  100GBASE-LR PAM4 10km (QSFP28) and a single mode fiber connecting 2 datacenters. 

Now to the issue. When i connect those 2 switches without stacking enabled everything looks good and working fine. In the moment i activate stacking (of course the stacking port is the one flapping) on one of the nodes the interface start flapping up and down in a weird behaviour. I thought this might be causing because of an old Firmware but even after upgrading and trying multiple firmware versions the issue still persist.

Dynamic Log Buffer (4000 lines):
Aug 12 23:26:45:I:System: Interface ethernet 1/3/5, line protocol down
Aug 12 23:26:45:I:System: Interface ethernet 1/3/5, state down
Aug 12 23:26:44:I:System: Interface ethernet 1/3/5, state up
Aug 12 23:26:21:I:System: Interface ethernet 1/3/5, line protocol down
Aug 12 23:26:21:I:System: Interface ethernet 1/3/5, state down
Aug 12 23:26:20:I:System: Interface ethernet 1/3/5, state up
Aug 12 23:26:09:I:System: Interface ethernet 1/3/5, line protocol down
Aug 12 23:26:09:I:System: Interface ethernet 1/3/5, state down
Aug 12 23:25:42:I:System: Interface ethernet 1/3/5, state up
Aug 12 23:25:32:I:System: Interface ethernet 1/3/5, line protocol down
Aug 12 23:25:32:I:System: Interface ethernet 1/3/5, state down
Aug 12 23:25:31:I:System: Interface ethernet 1/3/5, state up

Has anyone ever dealt with such an issue?

Thanks in advance.

[Chandini]

Hi Florian

Thank you for reaching us

Could you help me with below details

• Which version is the switch running on ?
• Which are the version you have tested ?

Would you be able to share a picture of below outputs 

• show version
• show stack detail
• show modules
• show media validation
• show media eth 1/3/5

Thanks 

[florian_willeke]

Hey, ive testet version 08095m, 09010h, 10010c.

it is currently running on 10010c.

Is there a way i can DM you those informations? I dont feel comfortable posting this public.

Thanks

Florian

[Chandini]

Hi Florian

I understand. Then could you log a case with us using the below link. 

• https://support.ruckuswireless.com/contact-us

Thanks