description VMware ESX Trunk port
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,10,11,130
switchport mode trunk
spanning-tree portfast trunk
STP Portfast is a feature in Cisco IOS which allows a switchport which
is participating in STP to directly transition from Blocking mode to
Forwarding mode when a device connects and the link goes up.
As vSwitches cant participate in a STP loop anyway, the port might as well start to forward right away..
Due to the specifics of VMware, the following design considerations apply:
• Configure the switchport trunk for trunkfast (i.e., such that the port goes forwarding immediately without waiting for Spanning Tree timers).