More study notes. Correct if wrong, though I hope I get some of it right since I already since I’m an R&S guy. :$
**Switchport Configuration
**
- switchport mode access: This config makes the port an access port that carries the primary and voice VLAN traffic
- switchport mode trunk: This config akes the port a trunk unconditionally, but it will still send DTP messages
- switchport nonegotiate: This config keeps the port from sending DTP messages.
- switchport mode dynamic auto: If the port receives DTP messages, it will become a trunk. If not, it will be an access port.
- switchport mode dynamic desirable: The port actively sends DTP messages trying to become a trunk. This is the default configuration on a Cisco switch.
Cisco IP Phone Boot Process