A10E/A28E/A28F Configuration Guide
Step 2 Add Port 2 and Port 3 of Switch B to VLAN 10 in Access mode, add Port 4 to VLAN 20 in
Access mode, and set Port 1 in Trunk mode to allow VLAN 10 packets to pass.
SwitchB(config)#interface port 2
SwitchB(config-port)#switchport mode access
SwitchB(config-port)#switchport access vlan 10
SwitchB(config-port)#exit
SwitchB(config)#interface port 3
SwitchB(config-port)#switchport mode access
SwitchB(config-port)#switchport access vlan 10
SwitchB(config-port)#exit
SwitchB(config)#interface port 4
SwitchB(config-port)#switchport mode access
SwitchB(config-port)#switchport access vlan 20
SwitchB(config-port)#exit
SwitchB(config)#interface port 1
SwitchB(config-port)#switchport mode trunk
SwitchB(config-port)#switchport trunk allowed vlan 10 confirm
SwitchB(config-port)#exit
Step 3 Add Port 2 of Switch A to VLAN 10 in Access mode, add Port 3 to VLAN 20 in Trunk mode,
and set Port 1 in Trunk mode to allow VLAN 10 packets to pass.
SwitchA(config)#interface port 2
SwitchA(config-port)#switchport mode access
SwitchA(config-port)#switchport access vlan 10
SwitchA(config-port)#exit
SwitchA(config)#interface port 3
SwitchA(config-port)#switchport mode access
SwitchA(config-port)#switchport access vlan 20
SwitchA(config-port)#exit
SwitchA(config)#interface port 1
SwitchA(config-port)#switchport mode trunk
SwitchA(config-port)#switchport trunk allowed vlan 10 confirm
Step 4 Enable interface protection on Port 2 and Port 3 on Switch B.
SwitchB(config)#interface port 2
SwitchB(config-port)#switchport protect
SwitchB(config-port)#exit
SwitchB(config)#interface port 3
SwitchB(config-port)#switchport protect
Checking results
Use the show vlan command to check whether VLAN configurations are correct.