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passthrough the Trunk port; traffic of VLANs not included are prohibited.
Example: Set Trunk port to allow traffic of VLAN1, 3, 5-20.
Switch(config)#interface ethernet 1/5
Switch(Config-If-Ethernet1/5)#switchport mode trunk
Switch(Config-If-Ethernet1/5)#switchport trunk allowed vlan 1;3;5-20
Switch(Config-If-Ethernet1/5)#exit
4.1.36 switchport trunk native vlan
Command: switchport trunk native vlan <vlan-id>
no switchport trunk native vlan
Function: Set the PVID for Trunk port; the ―no switchport trunk native vlan‖ command
restores the default setting.
Parameter: <vlan-id> is the PVID for Trunk port.
Command mode: Port Mode.
Default: The default PVID of Trunk port is 1.
Usage Guide: PVID concept is defined in 802.1Q. PVID in Trunk port is used to tag
untagged frames. When an untagged frame enters a Trunk port, the port will tag the
untagged frame with the native PVID set with this commands for VLAN forwarding.
Example: Set the native VLAN for a Trunk port to 100.
Switch(config)#interface ethernet 1/5
Switch(Config-If-Ethernet1/5)#switchport mode trunk
Switch(Config-If-Ethernet1/5)#switchport trunk native vlan 100
Switch(Config-If-Ethernet1/5)#exit
4.1.37 vlan
Command: vlan WORD
no vlan WORD
Function: Create VLANs and enter VLAN configuration mode. If using ';' and '-' connect
with multi-VLANs, then only create these VLANs. If only existing VLAN, then enter VLAN
configuration mode; if the VLAN is not exist, then create VLAN and enter VLAN
configuration mode. In VLAN Mode, the user can set VLAN name and assign the switch
ports to the VLAN. The no command deletes specified VLANs.
Parameter: WORD is the VLAN ID to be created/deleted, valid range is 1 to 4094,
connect with ';' and '-'.
Command mode: Global Mode.
Default: Only VLAN1 is set by default.