See the rest of the thread -- don't bother with those GBICs; if they were a problem, it would manifest itself as input/output errors or link flaps. An output drop means the packets was dropped before ever being transmitted, not mangled by crappy transceivers in-flight.
[sent from my mobile] On Jan 14, 2011, at 1:08 PM, "Robert VanOrmer" <[email protected]> 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. > > > > Thanks, > > Rob > > > >> Date: Fri, 14 Jan 2011 12:28:03 -0600 > >> From: Dan Letkeman <[email protected]> > >> To: Phil Mayers <[email protected]> > >> Cc: [email protected] > >> Subject: Re: [c-nsp] Constant output drops on etherchannel > >> Message-ID: > >> <[email protected]> > >> Content-Type: text/plain; charset=ISO-8859-1 > >> > >> 3560 or 3560G. > >> > >> (C3560-IPSERVICESK9-M), Version 12.2(53)SE2 > >> > >> Interface config: > >> > >> interface Port-channel2 > >> switchport trunk encapsulation dot1q > >> switchport trunk native vlan 3009 > >> switchport trunk allowed vlan 8,10,1008,1101,3009 switchport mode trunk > end > >> > >> I see more output drops during higher traffic, but I still see drops during > low traffic rates. Always more on one interface. > >> > >> I do have auto qos enabled for some of the phones I have connected to the > switches, but I don't have any qos on the etherchannel trunks. > >> > >> I'm just using the default etherchannel load balancing algorithm. > >> > >> Thanks, > >> Dan. > > > > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
