  Here is how to configure the 5224 port 1 to have 3 tagged vlans. vlan database vlan 1 name DefaultVlan media ethernet state active vlan 101 name v101 media ethernet state active vlan 102 name v102 media ethernet state active vlan 103 name v103 media ethernet state active!interface ethernet 1/1 switchport mode trunk switchport allowed vlan add 101-103 tagged Here is how to configure the Cisco 3750 to have 3 tagged vlans so that they work with the 5224: 3750(config)# vtp mode transparent     3750(config)# interface GigabitEthernet 1/0/1 3750(config-if)# switchport mode trunk 3750(config-if)# switchport trunk allowed vlan 101-103 3750(config-if)# switchport trunk encapsulation dot1q 3750(config-if)# exit       
I have a Cisco 3750 being used as the core switch and a few Dell 5224 switches. I would like to create an additional VLAN for my development servers, but how can I configure trunking to work between the Dell and Cisco switch thanks
VLAN and Trunking between 5224 and Cisco 3750