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Bridge GUI Guide: Network Configuration
76
3.3.4.10
BSS Unicast Rate Mode and Maximum Rate
NOTE:
You can
configure the uni-
cast minimum rate in
the Bridge CLI (refer to
the
CLI Software
Guide)
. On a radio us-
ing any 802.11g band,
the default is
1 Mbps
.
On a radio using any
802.11a band, the de-
fault is
6 Mbps
.
When a BSS is configured to use a
Unicast Rate Mode
setting
of
auto
(the default), the interface dynamically adjusts the bit
rate at which it transmits unicast data frames—throttling
between the configured
Unicast Maximum Rate
and the
minimum rate—to provide the optimal data rate for the
connection.
At a
Unicast Rate Mode
setting of
fixed
, the BSS will use the
configured
Unicast Maximum Rate
for all unicast transmissions.
Transmission rates are set in megabits per second (Mbps).
Unicast Maximum Rate
can be set only to a value greater than
or equal to the minimum rate. Usable values for
Unicast
Maximum Rate
settings depend on the
Band
setting for the
radio on which the BSS is configured, as indicated by the
markers in Table 3.6.
NOTE:
Radio
Band
settings are cov-
ered in detail in Section
3.3.2.2).
The default
Unicast Maximum Rate
for a new BSS specifies the
highest setting possible, as determined by the 802.11 standard
in use by the radio on which you are configuring the BSS. The
default depends on whether or not the radio is using 802.11n:
On a radio with an
802.11a
or
802.11g
Band
setting, the default
Unicast Maximum Rate
is
54 Mbps
. On a radio using any of the
802.11n settings in either frequency band, the default
Unicast
Maximum Rate
is
65 Mbps
.
You can configure
Unicast Rate Mode
and
Unicast Maximum
Rate
only in Advanced View.
3.3.4.11
BSS Multicast Rate
CAUTION:
Too high
a
Multicast Rate
will
limit the ability of a Fast-
Path Mesh network to es-
tablish adjacency with
neighbor MPs unable to
receive multi-/broadcast
packets at the specified
rate (due to distance, for
example).
The bit rate at which a wireless interface sends multicast
frames is negotiated per connection.
Multicast Rate
sets a floor
for multicast transmissions by specifying the lowest bit rate at
which the BSS will send multicast frames.
BSSs on a radio configured by default to use the 2.4 GHz
802.11g band have a default
Multicast Rate
of
1 Mbps
, which is
appropriate for a BSS using the 2.4 GHz frequency band,
typically to provide wireless access to local devices. Fortress
recommends leaving BSSs in the 802.11g band, including all
802.11ng options, at the default of
1
.
BSSs on a radio fixed on, or configured by default to use, the
5 GHz 802.11a band have a default
Multicast Rate
of
6 Mbps
,
Table 3.6. Usable BSS Rate Settings (in Mbps) per Radio Band Setting
1
2
5.5
6
9
11
12
18
24
36
48
54
6.5
13 19.5 26
39
52 58.5 65
802.11a
802.11g
802.11naht
802.11nght