3850/3750 QinQ

Luis Carlos Agripino de Carvalho Jr. · ‎11-18-2015

Hi guys,

The customer have a 3850 and a 3750 with QinQ configured. We have a problem with QinQ traffic that is in 3750 and your gateway is the 3850. All traffic pass through 3850 but QinQ traffic don't work. The catalyst 3850 is running 3.2.3 IOS XE.

paul driver · ‎11-18-2015

Hello

sh l2protocol-tunnel interface gig1/0/7
sh system mtu

res

Paul

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Kind Regards
Paul

omejia · ‎11-19-2015

Hi Luis,

There's no much information in this post however there's a known bug in Cat3850 that might be causing this issue:

CSCuo84770 - 3850/3.3.2SE/Not forwarding double dot1Q tagged packets

Is there any chance for you to upgrade the code? You can also try a "ip device tracking maximum 0" int he interfaces connected to the Cat3750.

Regards.

- Omar