I'm using a stack of two 3750 (one 3750G-12 and one 3750-48). This stack is connected to a 6500 via a 1000SX link (SFP). This link is a .1Q trunk. If I use a port on the first switch (3750G) I have many input error,
0 runts, 391 giants, 0 throttles
17767355 input errors, 20941 CRC, 0 frame, 0 overrun, 0 ignored
but if I move to a port on the other 3750 no more errors appear!