Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 107)

Brocade Mobility RFS Controller System Reference Guide 95
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12. Define or override the following Switching Mode parameters applied to the Ethernet port
configuration:
13. Optionally select the Port Channel check box from the Port Channel Membership area and
define or override a setting from 1 - 8 using the spinner control. This sets the channel group for
the port.
14. Select OK to save the changes and overrides made to the profile’s Ethernet Port Basic
Configuration. Select Reset to revert to the last saved configuration.
15. 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 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. Controller and service platforms 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 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.