HP A6600 Configuration Manual page 99

belong to VLAN 2 and other PCs belong to VLAN 3. Configure on Router C the port connecting to
the LAN as a hybrid port to allow packets of VLAN 2 and VLAN 3 to pass through untagged.
Figure 32 Network diagram for port link type configuration
Default VLAN
By default, VLAN 1 is the default VLAN for all ports. Configure the default VLAN for a port as required.
Use the following guidelines when configuring the default VLAN on a port:
An access port can join only one VLAN. The VLAN to which the access port belongs is the default
•
VLAN of the port. To change the default VLAN, assign the port to another VLAN.
A trunk or hybrid port can join multiple VLANs, and you can configure a default VLAN for the port.
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Use a nonexistent VLAN as the default VLAN for a hybrid or trunk port but not for an access port.
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After you remove the VLAN that an access port resides in with the undo vlan command, the default
VLAN of the port changes to VLAN 1. The removal of the VLAN specified as the default VLAN of a
trunk or hybrid port, however, does not affect the default VLAN setting on the port.
Do not set the voice VLAN as the default VLAN of a port in automatic voice VLAN assignment mode. For
information about voice VLAN, see the chapter "Voice VLAN configuration."
HP recommends that you set the same default VLAN ID for the local and remote ports.
Make sure that a port is assigned to its default VLAN. Otherwise, when the port receives frames tagged
with the default VLAN ID or untagged frames (including protocol packets such as MSTP BPDUs), the port
filters out these frames.
The following table shows how ports of different link types handle frames:
Port type
Access
Actions (in the inbound direction)
Untagged frame
Tag the frame with the
default VLAN tag.
Tagged frame
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Receive the frame if its
VLAN ID is the same as
the default VLAN ID.
•
Drop the frame if its VLAN
ID is different from the
default VLAN ID.
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Actions (in the outbound
direction)
Remove the VLAN tag and send
the frame.