Why is 'switchport trunk encapsulation <dot1q or isl> required on L3 switches? The default trunk encapsuation mode on 'modern' Cisco switches is to 'auto' negotiate, so why doesn't 'auto-negotiate' work when configured from the L3 sw...
John,You're absolutely correct. My hope is that Cisco will change its definition for 'switchport mode trunk.' This is from their documentation:switchport mode dynamic desirable Makes the interface actively attempt to convert the link to a trunk link...