Technical data

More QoS Rule Examples
© 2012 Meru Networks, Inc. Configuring Quality of Service 257
srcip-match on
srcip-flow on
srcmask 255.255.255.0
srcport 0
action drop
droppolicy tail
priority 0
avgpacketrate 0
tokenbucketrate 0
dscp disabled
qosrulelogging off
qosrule-logging-frequency 60
packet-min-length 0
packet-max-length 0
no trafficcontrol
802.11n Video Service Module (ViSM)
Video streaming has the low latency and loss requirements of voice with the
high-throughput requirements of data. The Meru Networks Video Service Module™ (ViSM)
is an optional licensed software module that delivers predictable 802.11 video perfor-
mance with minimal delay, latency and jitter. Sustainable high data rates, even in mixed
traffic, are supported along with synchronization of video and audio transmissions.
ViSM also introduces additional mechanisms for optimizing unicast and multicast video
such as application aware scheduling, voice/video synchronization, and client-specific
multicast group management. Features include the following:
 High throughput with low burstiness offers predictable performance and
consistent user experience
 Application-aware prioritization synchronizes the voice and video components of
a video stream, adapting the delivery of each frame based on its importance to
the application.
 Multicast group management optimizes delivery to only those Virtual Ports whose
clients are members of the multicast group.
 Seamless video-optimized handoff proactively reroutes the multicast delivery
tree to prevent lost video frames during a transition between access points and
ensures zero loss for mobile video.
 User and role based policy enforcement provides granular control over application
behavior.
 Visualization reveals which clients are running which applications.
Implementing ViSM
Virtual Port already changes multicast to unicast transmissions (for non-U-APSD clients).
ViSM adds per-client IGMP Snooping to the transmission. Therefore, to implement ViSM,
turn on IGMP Snooping. CLI commands control IGMP snooping (see Meru System Director
Command Reference). At this time, ViSM licensing is not enforced. ViSM is not recom-
mended for AP1000 access points.