HPE FlexNetwork MSR Series User Manual

103
Item Description
bandwidth mode
802.11n can bond two adjacent 20-MHz channels together to form a 40-MHz
channel. During data forwarding, the two 20-MHz channels can work separately
with one acting as the primary channel and the other acting as the secondary
channel or work together as a 40-MHz channel. This provides a simple way of
doubling the data rate.
By default, the channel bandwidth of the 802.11n radio (5 GHz) is 40 MHz, and that
of the 802.11n radio (2.4GHz) is 20 MHz.
IMPORTANT:
• If the channel bandwidth of the radio is set to 40 MHz, a 40 MHz channel is
used as the working channel. If no 40 MHz channel is available, a 20 MHz
channel is used. For the specifications, see IEEE P802.11n D2.00.
• If you modify the bandwidth mode configuration, the transmit power will be
automatically adjusted.
client dot11n-only
If you select the
client dot11n-only
option, non-802.11n clients are prohibited
from access. If you want to provide access for all 802.11a/b/g clients, disable this
function.
A-MSDU
Selecting the
A-MSDU
option enables A-MSDU.
Multiple MSDUs can be aggregated into a single A-MSDU. This reduces the MAC
header overhead, improving MAC layer forwarding efficiency.
Only A-MSDUs can be received.
IMPORTANT:
When 802.11n radios are used in a mesh WLAN, make sure that they have the
same A-MSDU configuration.
A-MPDU
Selecting the
A-MPDU
option enables A-MPDU.
802.11n introduces the A-MPDU frame format. By using only one PHY header,
each A-MPDU can accommodate multiple Message Protocol Data Units (MPDUs)
which have their PHY headers removed. This reduces the overhead in
transmission and the number of ACK frames to be used, and thus improves
network throughput.
IMPORTANT:
When 802.11n radios are used in a mesh WLAN, make sure that they have the
same A-MSDU configuration.
short GI
Selecting the
short GI
option enables short GI.
Delays may occur during receiving radio signals due to factors like multi-path
reception. Therefore, a subsequently sent frame may interfere with a previously
sent frame. The GI function is used to avoid such interference. It increases the
throughput by 10 percent.
The short GI function is independent of bandwidth and thus supports both 20MHz
and 40MHz bandwidths.

HPE FlexNetwork MSR Series Specifications

General

Brand	HPE
Model	FlexNetwork MSR Series
Category	Network Router
Language	English