[c-nsp] Constant output drops on etherchannel

Phil Mayers p.mayers at imperial.ac.uk
Sat Jan 15 10:29:52 EST 2011


On 01/14/2011 09:08 PM, Robert VanOrmer wrote:
> I am experiencing a very similar issue on the C3750E platform w/ 12.2(52)SE.
> We have 5 switches in a cluster, port-channeled with (2) Gig interfaces L2
> to distro (6500's) with excessive output drops even at low utilization.  No
> QoS enabled.  I am using the Cisco TwinGig Converter Modules for uplinks..
> We have a TAC case open, but no progress yet.  I'd be interested in knowing
> if you find a cause. I am going to try swapping GBICs over the weekend.

3750s also have tiny buffers, so will suffer similar problems.

They are "LAN" switches, and as such Cisco deem it unnecessary for them 
to actually pass traffic reliably!


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