Chapter 6. Manage / Configure the Switch
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no switchport mode private-vlan command will set the port type of the interface port(s) in Private VLAN as
“normal”. “normal” port(s) is for normal 802.1Q VLAN operation.
[ VLAN Port Tag/Untag Setting for 802.1Q VLAN ]
switchport mode hybrid command will set the interface port(s) as hybrid port(s) for 802.1Q VLAN operation. If a
port is defined as “hybrid”, it is a tag port basically. But it will act as an untag port for packets working in VLAN
defined in “Untag VID”. So, it is called a hybrid port.
For example, set Port 5 as “hybrid” and its Untag VID as 10. Port 5 will act as a tag port for all packets except
packets for VLAN 10. Port 5 will act as an untag port for packets working for VLAN 10.
switchport mode trunk command will set the interface port(s) as tag port(s) for 802.1Q VLAN operation. Tag port
will always send tagged packets and is used for switch-to-switch cascading. It is a VLAN trunk connection because
there could be more than one VLAN working through it.
switchport mode access command will set the interface port(s) as untag port(s) for 802.1Q VLAN operation. Untag
port will always send untagged packets and is used for switch to users connection. And its role is a “access”
connection for users
[ Port VLAN ID Setting ]
switchport native vlan x command is used to assign VLAN ID of the native VLAN for classifying untagged frames
on ingress port. “x” is the port VLAN ID (PVID) and its valid value is 1~4094.
When untagged packet is received, PVID of the ingress port will be used as its working VLAN ID. PVID is also
used as the VLAN ID for tag adding when untagged packet is translated to tagged packet.
[ Untag VLAN ID Setting for Hybrid Ports ]
switchport untag-vid x command is used to set untag-VID of the port. It is used when this port is set to “hybrid”
role for 802.1Q function. And packets for this untag-VLAN will be forwarded with untagged. Other packets will be
forwarded with tagged. “x” is the VLAN ID and its valid value is 1~4094.
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