I have 1 3550 and 2 2950 switches connected using a GigaStack Cable using the below setup
3550 (Gigastack to 2950-SW1 and 2950-SW2 using Port Gi0/2)
2950-SW1 to 2950-SW2 using GigaStack(Ports Gi0/1 on both)
I somehow cannot seem to configure a 802.1q trunk on any of the interfaces. DTP doesn't seem to work and even forcing the interfaces to be trunks, they still don't show up in the command "show interfaces trunk".
Is there any special config required for this ?