I recently inherited a 4006, which I'm attempting to trunk with our 3750 stack. I have fast ethernet ports on both ends set up to trunk according to the instructions here:
I'm unable to get the connection to come up. Neither port shows up as a trunk port, but I assume this is normal until they're able to establish a connection with another trunk port. I am able to get a connection by plugging a laptop into the interface on either switch. I have also verified that the VTP configuration is the same on both ends. Any suggestions?