Can anyone confirm if that if I plug a trunk port from one switch into an access port on another switch, will this form a trunk automatically? where should I issue the command, on trhe trunk port to stop it sending DTP frames ?
In respoinding to your first comment,
trunking will form if the switch with the trunk is negotiating through DTP (desirable) then the other switch will respond to DTP negotiation request and form trunk.
DTP negotiation can be disabled two ways, with the switchport access mode command or with the switchport nonegetiate command. If trunking is needed, but DTP is diable, it must be statically configured with the switchport mode trunk command. This design is most commonly used when a switch is trunking to a device that does not support DTP such as IOS routers routed ethernet interface )Not an etherswitch interface), or a servers NIC card.