Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 319)

Brocade Mobility RFS Controller System Reference Guide 307
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5. Set the following Accelerated Multicast settings:
6. 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 Email are harder to estimate, since
bandwidth usage varies depending on how the applications are utilized.
Radio QoS Policy
Without a dedicated QoS policy, a wireless 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
customizations 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 allow the administrator to have multicast packets converted 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 QoS classifications. Packets are
accelerated when the destination addresses matches.