Port-based VLANs group VLAN members by port. A port forwards packets from a VLAN only after it is assigned to the VLAN.
Port link type
You can configure the link type of a port as access, trunk, or hybrid. The link types use the following VLAN tag handling methods:
Access—An access port can forward packets from only one VLAN and send these packets untagged. An access port can connect a terminal device that does not support VLAN packets or is used in scenarios that do not distinguish VLANs.
Trunk—A trunk port can forward packets from multiple VLANs. Except packets from the port VLAN ID (PVID), packets sent out of a trunk port are VLAN-tagged. Ports connecting network devices are typically configured as trunk ports.
Hybrid—A hybrid port can forward packets from multiple VLANs. A hybrid port allows traffic from some VLANs to pass through untagged and traffic from other VLANs to pass through tagged. Hybrid ports are typically used in one-to-two VLAN mapping to remove SVLAN tags before forwarding packets from multiple service provider VLANs to the customer network. For more information about one-to-two VLAN mapping, see "Configuring VLAN mapping."
PVID
The PVID identifies the default VLAN of a port.
When you configure the PVID on a port, follow these restrictions and guidelines:
An access port can join only one VLAN. The VLAN to which the access port belongs is the PVID of the port.
A trunk or hybrid port can carry multiple VLANs, and you can configure a PVID for the port.
When you use the undo vlan command to delete the PVID of a port, the following conditions occur depending on the port link type:
For an access port, the PVID of the port changes to VLAN 1.
For a hybrid or trunk port, the PVID setting of the port does not change.
You can use a nonexistent VLAN as the PVID for a hybrid or trunk port, but not for an access port.
HP recommends that you set the same PVID for local and remote ports.
Make sure a port is assigned to its PVID. Otherwise, when the port receives frames tagged with the PVID or untagged frames, the port filters out these frames.
How ports of different link types handle frames
Actions | Access | Trunk | Hybrid | |
|---|---|---|---|---|
In the inbound direction for an untagged frame | Tags the frame with the PVID tag. |
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In the inbound direction for a tagged frame |
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In the outbound direction | Removes the VLAN tag and sends the frame. |
| Sends the frame if its VLAN is permitted on the port. The tagging status of the frame depends on the port hybrid vlan command configuration. | |
