GE MDS SD4A Technical Manual page 59

Listen Before
Transmit (LBT)
Settings
MDS 05-4846A01, Rev. F
When the Ethernet port of a Remote radio is configured as a VLAN
trunk, the radio expects all incoming Ethernet frames to be tagged, and
passes through all outgoing frames as received from the wireless link
with the unchanged VLAN tag.
Mode
• —Defines the Ethernet port as
untagged port). The default setting is
be the last parameter changed when configuring the VLAN
feature, since any Telnet or web connections will be lost after
it is changed. Also, configure the appropriate IP and IP2 settings
before changing this parameter.
Data ID
• —Defines the VLAN ID assigned to the AP's LAN traffic
that is to be delivered to an Access Port, and the terminal server
service, or the IP payload service. The ID is used for filtering and
tagging purposes. Any valid ID from 1 to 4095 may be entered.
The default is 1.
Mgmt ID
• —Defines the VLAN ID assigned to the AP's LAN traffic
that is to be delivered to the SD radio. Note that traffic for the ter-
minal server and IP payload service is expected in the data
VLAN. This ID is used for filtering and tagging purposes. Any
valid ID from 1 to 4095 may be entered. The default is 2.
Gateway IF
• —Defines the VLAN that contains the default gateway
in the radio. Available selections are
Mgmt
setting is .
CAUTION: The
VLAN Mode
and Remote radios in order for data to flow correctly. Failure to do so
may result in data not being transported correctly even when the radios
are able to communicate over-the-air via an RF link.
The SD Transceiver provides a legacy collision avoidance scheme
called Listen Before Transmit (LBT). It employs P-Persistent CSMA
protocol, which senses channel usage and inhibits transmission if the
channel is currently in use. CSMA is an abbreviation for Carrier Sense
Multiple Access. This setting is superseded by Packet w/MAC and
should only be used in legacy systems and special use cases.
NOTE: The Listen Before Transmit (LBT) feature requires radios to
be configured for Packet Mode operation. Packet with MAC
operation provides an alternative media access method.
SD Series Technical Manual
Trunk Access
,
Disable
Mgmt
and
parameter must be consistent at both the AP
Disable
, or (an
. The mode should
Data
. The default
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