H3C MSR Series Configuration Guide

16
Step Command Remarks
12. Set the maximum number of
retransmission attempts for
frames larger than the RTS
threshold.
long-retry threshold
count
Optional.
By default, the long retry threshold
is 4.
13. Specify the maximum number of
attempts to transmit a frame
shorter than the RTS threshold.
short-retry threshold
count
Optional.
By default, the short retry
threshold is 7.
14. Specify the interval for the AP to
hold received packets.
max-rx-duration
interval
Optional.
By default, the interval is 2000
milliseconds.
15. Configure collision avoidance
• Specify the request to
send (RTS) threshold
length.
rts-threshold size
• Specify a collision
avoidance mechanism.
protection-mode
{ cts-to-self | rts-cts }
• Optional.
By default, the RTS threshold
is 2346 bytes.
• Optional.
By default, the collision
avoidance mechanism is
CTS-to-Self.
Configuring 802.11n
The following matrix shows the feature and router compatibility:
Featur
e
MSR80
0
MSR
900
MSR90
0-E
MSR
930
MSR
20-1X
MSR 20 MSR 30 MSR 50
802.11n
Available
for
MSR800
-W and
MSR800
-10-W.
No
Availabl
e for
MSR90
0-E-W.
Available
for MSR
930-W,
MSR
930-W-G
U, and
MSR
930-W-G
T.
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_WL
AN
module
that
supports
802.11n
As the next generation wireless LAN technology, 802.11n supports both 2.4-GHz and 5-GHz bands.
It provides higher throughput by using the following methods:
• Increasing bandwidth: 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 working
together as a 40-MHz channel. This provides a simple way of doubling the data rate.
• Improving channel utilization through the following ways:
{ 802.11n introduces the A-MPDU frame format. By using only one PHY header, each
A-MPDU can accommodate multiple MPDUs which have their PHY headers removed. This
reduces the overhead in transmission and the number of ACK frames to be used, and
improves network throughput.
{ Similar with MPDU aggregation, multiple MSDU can be aggregated into a single A-MSDU.
This reduces the MAC header overhead and improves MAC layer forwarding efficiency.
{ To improve physical layer performance, 802.11n introduces the short GI function, which
shortens the GI interval of 800 ns in 802.11a/g to 400 ns. This can increase the data rate by
10 percent.

H3C MSR Series Specifications

General

Category	Network Router
IPv6 Support	Yes
Dimensions	Varies by model
Weight	Varies by model
Product Type	Modular Router
Ports	Varies by model
WAN Interfaces	Varies by model
Firewall	Yes
QoS	Yes
Wireless Support	Varies by model
USB Ports	Varies by model
Console Port	Yes
Power Supply	Varies by model
Redundancy	Varies by model
Operating Temperature	0°C to 45°C
Storage Temperature	-40°C to 70°C
Humidity	5% to 95% non-condensing
Series	MSR
Certifications	CE, FCC, RoHS