Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 101)

Brocade Mobility Access Point System Reference Guide 91
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9. Define the following Switching Mode parameters to apply to the port channel configuration:
10. Select OK to save the changes made to the port channel Basic Configuration. Select Reset to
revert to the last saved configuration.
11. Select the Security tab.
Mode Select either the Access or Trunk radio button to set the VLAN switching mode over the port channel. If
Access is selected, the port channel 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 channel allows packets from a
list of VLANs you add to the trunk. A port channel configured as Trunk supports multiple 802.1Q tagged
VLANs and one Native VLAN which can be tagged or untagged. Access is the default setting.
Native VLAN Use the spinner control to define a numerical 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 trunk
mode. The default value is 1.
Tag the Native VLAN Select this option to tag the native VLAN. Access points support the IEEE 802.1Q specification 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 setting is disabled by default.
Allowed VLANs Selecting Trunk as the mode enables the Allowed VLANs parameter. Add VLANs that exclusively send
packets over the port channel.