Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 265)

Brocade Mobility Access Point System Reference Guide 255
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Set (or override) the following Switching Mode parameters to apply to the Ethernet port
configuration:
Optionally select the Port Channel Membership option and define (or override) a setting from 1 - 8
using the spinner control. This sets the channel group for the port.
Select OK to save the changes made to the Ethernet Port Basic Configuration. Select Reset to
revert to the last saved configuration.
Select the Security tab.
Mode Select either the Access or Trunk radio button to set the VLAN switching mode over the port. If
Access is selected, the port accepts packets only form the native VLANs. Frames are forwarded out
the port untagged with no 802.1Q header. All frames received on the port are expected as
untagged and are mapped to the native VLAN. If the mode is set to Trunk, the port allows packets
from a list of VLANs you add to the trunk. A port configured as Trunk supports multiple 802.1Q
tagged VLANs and one Native VLAN which can be tagged or untagged. Access is the default mode.
Native VLAN Use the spinner control to define a numerical Native VLAN ID from 1 - 4094. The native VLAN allows
an Ethernet device to associate untagged frames to a VLAN when no 802.1Q frame is included in
the frame. Additionally, the native VLAN is the VLAN which untagged traffic will be directed over
when using a port in trunk mode. The default VLAN is 1.
Tag Native VLAN Select this option to tag the native VLAN. The IEEE 802.1Q specification is supported for tagging
frames and coordinating VLANs between devices. IEEE 802.1Q adds four bytes to each frame
identifying the VLAN ID for upstream devices that the frame belongs. If the upstream Ethernet
device does not support IEEE 802.1Q tagging, it does not interpret the tagged frames. When VLAN
tagging is required between devices, both devices must support tagging and be configured to
accept tagged VLANs. When a frame is tagged, the 12 bit frame VLAN ID is added to the 802.1Q
header so upstream Ethernet devices know which VLAN ID the frame belongs to. The device reads
the 12 bit VLAN ID and forwards the frame to the appropriate VLAN. When a frame is received with
no 802.1Q header, the upstream device classifies the frame using the default or native VLAN
assigned to the Trunk port. The native VLAN allows an Ethernet device to associate untagged
frames to a VLAN when no 802.1Q frame is included in the frame. This feature is disabled by
default.
Allowed VLANs Selecting Trunk as the mode enables the Allowed VLANs parameter. Add VLANs that exclusively
send packets over the listed port.