Have an existing 2960G Cisco switch that the VLAN1 interface is setup with an IP and the next line is the trunk command:
switchport mode trunk
There is no Dot1Q encapsulation for this interface on the existing 2960 when I look at the config and it works fine. When I try to do this on a new 3750G stack I get the following error:
Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode.
I have seen where I may need to add the dot1q encap but want to make sure especially since I am connecting to an older Extreme 3804 Switch and it either did not have to be done on the existing 2960G or is it possibly transparent to me? Any help much appreciated.