I was hoping someone can help me out. We have a 3750 connected to an Avaya G700 and for some reason when i plug it into the 3750 it comes up green on the port but i get no ip connectivity. I tried on one of my other switches and no problem and tried it on a 4507R and i had to disable spanning-tree but it then worked. The wierd thing is that it works if i put a hub between the g700 and the 3750 no matter what type of hub.
Just wondering anyone have any ideas of what it might be and what might be different from a 5500 and a 3750 to cuase this issue?