Fortress Technologies ecure Wireless Access Bridge User Manual

Page of 144
Fortress Bridge: Configuration
26
‹
Non-Root
 - 
Radios in 
Non-Root
 mode do initiate connections 
with other Fortress Bridges—either directly with a root 
Bridge or with other non-root Bridges (as well as receiving 
connections from other non-root Bridges and wireless 
devices).
Typically, one Bridge serves as the root node (or root Bridge) 
and any other Bridges in the deployment are configured as 
non-root nodes.
In the Bridge’s default configuration, only 
Radio 2
 is configured 
with a 
Radio Mode
 of 
Bridge
, and it is in 
Root 
mode.
3.3.2
Radio Transmission and Reception Settings
CAUTION:
 In point-
to-point/multi-
point deployments the
radios used to connect
the networked Bridges
must be configured with
identical transmission
and reception settings.
In addition to establishing the basic uses and roles of the 
Bridge’s internal radios (Section Section 3.3.1), you ca
configure a number of operating parameters through the Bridge 
GUI.
3.3.2.1
Channel
The 
Channel
 setting selects the portion of the radio spectrum 
over which the radio will communicate.
Radios in non-root bridging mode do not bind to a channel, but 
rather to an SSID. The 
Channel
 setting will therefore be grayed 
out for either radio with a 
Radio Mode
 setting of 
Bridge
 and a 
Bridge Mode
 setting of 
Non-Root
.
The channels available for a radio in 
AP
 
Radio Mode
 or in 
Root
 
Bridge Mode
 are a function of the frequency band it uses. 
‹
On 
Radio 2
 and 
Radio 1
 when it is configured to use the 
802.11a band, you can select channels 
36
40
44
48
52
56
60
64
149
153
157
, or 
161
.
‹
On 
Radio 1
, when it is configured to use the 802.11g band, 
you can select channels 
1
11
, inclusive.
The default channel setting for 
Radio 1
 when it is using the 
802.11G band is 
1
; on the 802.11a band its default setting is 
36
The default channel setting of 
Radio 2
 is 
149
.
Selectable channel options for 
Radio 1
 therefore depend on the 
Radio Band
 selection made for it. (
Radio 2
 is fixed on the 
802.11a band; its channel selection options do not change.)
3.3.2.2
Transmit Power
The 
TxPower
 setting specifies the power level at which the 
radio will transmit—from 
1
 to 
18
 dBm (decibels referenced to 
milliwatts), in increments of 1 dBm—or, by selecting 
Auto
 (the 
default for both radios), which configures the radio to transmit 
at maximum power (26 dBm for both radios).
In environments with a dense distribution of APs (and resulting 
potential for interference), it may be desirable to select a lower 
TxPower
 setting than the default (
Auto
) for 
Radio 1
 when it is 
configured to use the 802.11g band. The 
Auto
 setting is 
otherwise appropriate for both radios.