I'm having an issue which I've been scratching my head about.

I have a ME-3400G-12CS with a 5x gig-E Portchannel using Gi0/12 - 16 classifying and adding CoS markings for downstream devices connected via two 4x GigE Portchannels. I'm seeing output queue drops on both downstream portchannels. The drops are all happening in Queue 3 Weight 2 which I'm assuming is the default queue since I haven't applied any output policy maps.

What is confusing to me is that there really isn't a speed mismatch from upstream to downstream. Frames should be able to be switched out just as soon as it comes in.

Any thoughts on how to alleviate this?

-ML

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