topic vdx-6740 ports respond differently to the same cable(transceiver) in Data Center (VDX)

vdx-6740 ports respond differently to the same cable(transceiver)

Pawel_Eljasz — Mon, 08 Oct 2018 20:37:00 GMT

hi everyone

I have SFP+ cables which seems to work fine but on one(maybe more?) port(Te 2/0/27) I see "unqualified transceiver" and port gets put down administratively.
Now, next door ports, eg 25 or 29 do not do that, I think I got "unqualified" transceiver but port stay up/online.

Is this not weird? Why switch would be doing this?

nos 7.2.0a1

many thanks, L.

RE: vdx-6740 ports respond differently to the same cable(transceiver)

Yulia_Abitbul — Mon, 08 Oct 2018 20:45:00 GMT

HI L,

If its unsupported transceiver, then it wasn't tested by Extreme, behavior might be unpredictable.

Best Regards,
Yulia

RE: vdx-6740 ports respond differently to the same cable(transceiver)

Deep_Bakul_Bhoj — Mon, 08 Oct 2018 21:22:00 GMT

Can you post the show media int te when the sfp is plugged in the vdx?

RE: vdx-6740 ports respond differently to the same cable(transceiver)

Pawel_Eljasz — Tue, 09 Oct 2018 15:29:00 GMT

I think it might have had something to do with a node used "broadcast" instead of LACP.
I think that because whichever switch ports I connected the node to those ports would go adminDown after a short wile.

I'll take more time to find if that was the root cause.

(node being Centos with net team device spanning two SPF+ ports(dual port NIC))

Would/should switch behave this way is such a situation?