Does anyone have a cisco trunk port config ? I am setting up vm network switch with 2 ports that will have a few vlans.
i am using VST
interface GigabitEthernet1/1
description VMware ESX Trunk port
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,10,11,130
switchport mode trunk
switchport nonegotiate
spanning-tree portfast trunk
/Rubeck
hi
why do I need to enabled portfast on the 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..
From
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).
we also have loopguard enabled. Its generating errors even with portfast enabled on the trunks. Should I disbale loopguard?
