Port-Based Vlan - HP 1910 User Manual

Port-based VLAN

Port-based VLANs group VLAN members by port. A port forwards traffic for 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 specific VLAN and send these packets
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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
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some VLANs to pass through untagged and traffic from other VLANs to pass through tagged.
PVID
By default, VLAN 1 is the PVID for all ports. You can change the PVID for a port as required.
Follow these guidelines when you configure the PVID on a port:
An access port can join only one VLAN. The VLAN to which the access port belongs is the PVID of
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the port.
A trunk or hybrid port can join multiple VLANs, and you can configure a PVID for the port.
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• You can use a nonexistent VLAN as the PVID for a hybrid or trunk port but not for an access port.
After you delete the VLAN that an access port resides in, the PVID of the port changes to VLAN 1.
Deleting the VLAN specified as the PVID of a trunk or hybrid port, however, does not affect the PVID
setting on the port.
Do not set the voice VLAN as the PVID of a port in automatic voice VLAN assignment mode. For
•
information about voice VLAN, see
HP recommends that you set the same PVID for local and remote ports.
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Make sure that a port permits its PVID. Otherwise, when the port receives frames tagged with the
•
PVID or untagged frames, the port drops these frames.
Frame handling methods
The following table shows how ports of different link types handle frames:
Actions
In the inbound
direction for an
untagged frame
In the inbound
direction for a
tagged frame
Access
Tags the frame with the
PVID tag.
•
Receives the frame if
its VLAN ID is the
same as the PVID.
•
Drops the frame if its
VLAN ID is different
from the PVID.
"Configuring a voice VLAN."
Trunk
Checks whether the PVID is permitted on the port:
•
If yes, tags the frame with the PVID tag.
•
If not, drops the frame.
•
Receives the frame if its VLAN is permitted on the port.
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Drops the frame if its VLAN is not permitted on the port.
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Hybrid