H3C Technologies H3C S7500E Series Switches - Manual (Page 215)

15-7
Do not set the voice VLAN as the default VLAN of a port in automatic voice VLAN assignment
mode. For information about voice VLAN, refer to
Voice VLAN Configuration .
You are recommended to set the same default VLAN ID for the local and remote ports.
Ensure 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 STP
BPDUs), the port filters out these frames.
Ports of different link types handle frames as follows:
Actions (in the inbound direction)
Port type
Untagged frame Tagged frame
Actions (in the outbound
direction)
Access
Tag the frame with the
default VLAN tag.
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.
Remove the default VLAN tag
and send the frame.
Trunk
Remove the tag and send
the frame if the frame carries
the default VLAN tag and
the port belongs to the
default VLAN.
Send the frame without
removing the tag if its VLAN
is carried on the port but is
different from the default
one.
Hybrid
Check whether the
default VLAN is permitted
on the port:
If yes, tag the frame
with the default VLAN
tag.
If not, drop the frame.
Receive the frame if its
VLAN is carried on the
port.
Drop the frame if its VLAN
is not carried on the port. Send the frame if its VLAN is
carried on the port. The frame is
sent with the VLAN tag removed
or intact depending on your
configuration with the port
hybrid vlan command. This is
true of the default VLAN.
Assigning an Access Port to a VLAN
You can assign an access port to a VLAN in VLAN view, interface view (including Ethernet interface
view, Layer 2 aggregate interface view), or port group view.