I have abnormal stattistic of runts errors on ethernet of C3750 (both GE MM, FE UTP) in case I connected PIX firewall ports in trunk mode. LED on C3750 port blink yellow. All other errors counters in order. Total statistic is 1 runts per 2-3 totoal pockets.
(I mean GE ports, than I use PIX 535 with MM optic connection, FE - PIX 525 with ordinary UTP connetctions. Some fact - then I changed "mode auto" on FE ports C3750 to fixed value, statistic RUNTS|TotalPackets changed from 1/1 òî 1/3)
At the same time i havn't problem with throughtput or interface resets.
I have run into the exact same issue, the trunked port on the 3750 connects back to a 3662 and I see runts and the same blinking yellow light. IOS code is currently c3750-i5-mz.121.14-EA1a.bin. A second 3750 was upgraded to 121.19 level with the same result. I would suspect a "bug" in the IOS code. Anyone else have suggestions?
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