R3204P16-HP Load Balancing Module Network Management Configuration Guide-6PW101

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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:
• An access port belongs to only one VLAN. Usually, ports directly connected to PCs are configured
as access ports.
• A trunk port can carry multiple VLANs to receive and send traffic for them. Usually, ports connecting
network devices are configured as trunk ports to allow members of the same VLAN to communicate
with each other across multiple network devices.
• A hybrid port can also carry multiple VLANs to receive and send traffic for them. You can configure
a port connected to a network device or user terminal as a hybrid port for access link connectivity
or trunk connectivity.
PVID
By default, VLAN 1 is the PVID for all ports. You can configure the PVID for a port as required.
Use the following guidelines when configuring 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
the port. The PVID of the access port changes along with the VLAN to which the port belongs.
• A trunk or hybrid port can join multiple VLANs, and you can configure a PVID for the port.
• You can use a nonexistent VLAN as the PVID for a hybrid or trunk port but not for an access port.
After you remove the VLAN that an access port resides in with the undo vlan command, the PVID
of the port changes to VLAN 1. The removal of the VLAN specified as the PVID of a trunk or hybrid
port, however, does not affect the PVID setting on the port.
NOTE:
• HP recommends that you set the same PVID for local and remote ports.
• Make sure that a port is assigned to its PVID. Otherwise, when the port receives frames tagged with the
PVID or untagged frames (including protocol packets such as STP BPDUs), the port filters out these
frames.
The following table shows how ports of different link types handle frames:
Port type
Actions (in the inbound direction)
Actions (in the outbound
direction)
Unta
gg
ed frame Ta
gg
ed 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.
Removes the VLAN tag and
sends the frame.