Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 461)

Brocade Mobility Access Point System Reference Guide 451
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Set the following Accelerated Multicast settings:
Select OK when completed to update this WLAN’s Multimedia Optimizations settings. Select Reset
to revert the screen back to its last saved configuration.
WLAN QoS Deployment Considerations
Before defining a QoS configuration on a WLAN, refer to the following deployment guidelines to
ensure the configuration is optimally effective:
• WLAN QoS configurations differ significantly from QoS policies configured for associated
access point radios. WLAN QoS configurations are designed to support the data requirements
of wireless clients, including the data types they support and their network permissions. Radio
QoS policies are specific to the transmit and receive characteristics of the connected radio’s
themselves, independent from the wireless clients these access point radios support.
• Enabling WMM support on a WLAN only advertises WMM capability to wireless clients. The
wireless clients must be also able to support WMM and use the parameters correctly while
accessing the wireless network to truly benefit.
• Rate limiting is disabled by default on WLANs. To enable rate limiting, a threshold must be
defined for WLAN.
• Before enabling rate limiting on a WLAN, a baseline for each traffic type should be performed.
Once a baseline has been determined, a minimum 10% margin should be added to allow for
traffic bursts.
• The bandwidth required for real-time applications such as voice and video are very fairly easy
to calculate as the bandwidth requirements are consistent and can be realistically trended
over time. Applications such as Web, database and E-mail are harder to estimate, since
bandwidth usage varies depending on how the applications are utilized.
Radio QoS Policy
Wireless Configuration
Without a dedicated QoS policy, a network operates on a best-effort delivery basis, meaning all
traffic has equal priority and an equal chance of being delivered in a timely manner. When
congestion occurs, all traffic has an equal chance of being dropped!
When configuring a QoS policy for a radio, select specific network traffic, prioritize it, and use
congestion-management and congestion-avoidance techniques to provide deployment
customization best suited to each QoS policy’s intended wireless client base.
Disable Multicast
Streaming Select this option to disable all Multicast Streaming on the WLAN.
Automatically Detect
Multicast Streams Select this option to convert multicast packets to unicast to provide better overall airtime utilization
and performance. The administrator can either have the system automatically detect multicast
streams and convert all detected multicast streams to unicast, or specify which multicast streams
are converted to unicast. When the stream is converted and queued for transmission, there are a
number of classification mechanisms that can be applied to the stream and the administrator can
select what type of classification they want.
Manually Configure
Multicast Addresses Select this option and specify a list of multicast addresses and classifications. Packets are
accelerated when the destination addresses matches.