CISCO Trunks, VTP mode and DTP verifications.
# Shows trunks on switch # and allowed VLANS on those trunks show interfaces trunk # Use this command to verify VTP mode # running on switch. 3 modes; # Server mode, Client and Transparent show vtp status # shows whether or not switch is # running dynamic trunk protocol (DTP) # for example fast ethernet port 0/23 show interfaces fa0/23 switchport