R2511-HP MSR Router Series WLAN Configuration Guide(V5)

26
Ste
p
Command Remarks
3. Configure rates for 802.11b.
dot11b { disabled-rate |
mandatory-rate | multicast-rate |
supported-rate } rate-value
Optional.
By default, no rates are disabled.
Mandatory rates are 1 and 2. The
multicast rate is automatically
selected from mandatory rates.
Supported rates are 5.5 and 11.
4. Configure rates for 802.11g.
dot11g { disabled-rate |
mandatory-rate | multicast-rate |
supported-rate } rate-value
Optional.
By default, no rates are disabled.
Mandatory rates are 1, 2, 5.5,
and 11. The multicast rate is
automatically selected from
mandatory rates. Supported rates
are 6, 9, 12, 18, 24, 36, 48, and
54.
Configuring 802.11n rates
The following matrix shows the feature and router compatibility:
Feature MSR900 MSR93X
MSR20-1
X
MSR20 MSR30 MSR50
MSR100
0
802.11n No
Available
for
JG512A,
JG519A
and
JG597A
Available
for routers
with a
SIC_WLAN
module that
supports
802.11n
Available
for routers
with a
SIC_WLA
N module
that
supports
802.11n
Available
for routers
with a
SIC_WLA
N module
that
supports
802.11n
Available
for routers
with a
SIC_WLA
N module
that
supports
802.11n
Available
for routers
with a
SIC_WLA
N module
that
supports
802.11n
Configuration of mandatory and supported 802.11n rates is achieved by specifying the maximum
Modulation and Coding Scheme (MCS) index. The MCS data rate table shows relations between data
rates, MCS indexes, and parameters that affect data rates. A sample MCS data rate table (20 MHz) is
shown in Table 1, and a sa
mple MCS data rate table (40 MHz) is shown in Table 2.
As shown in the two tables, MCS 0 through MCS 7 use one spatial stream, and the data rate
corresponding to MCS 7 is the highest; MCS 8 through MCS 15 use two spatial streams, and the data
rate corresponding to MCS 15 is the highest.
Table 1 MCS data rate table (20 MHz)
MCS index
Number of spatial
streams
Modulation
Data rate (Mb
p
s)
800ns GI 400ns GI
0 1 BPSK 6.5 7.2
1 1 QPSK 13.0 14.4
2 1 QPSK 19.5 21.7
3 1 16-QAM 26.0 28.9
4 1 16-QAM 39.0 43.3