On Tue, 29 Nov 2016, TJ Trout wrote:

Could this be MTU? I've tried flow control, hard code duplex, stp on/off etc

As others have pointed out, you probably have a switch with small buffers.

If you also have flow control and you have something that triggers flow control to turn off packet forwarding, your small-buffer-switch might fill up all (shared) buffers on that port and now you're dropping traffic to all ports.

So trying to find if you have something where flow control is enabled and is being triggered might be something worthwhile to do, and also perhaps just turn off flow control on all ports to make sure.

--
Mikael Abrahamsson    email: swm...@swm.pp.se

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