Enabling Mesh Multicast Containment For Video - Cisco aironet 1522 Design And Deployment Manual

Connecting the Cisco 1520 Series Mesh Access Point to Your Network
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Enabling Mesh Multicast Containment for Video

You can use the controller CLI to configure three mesh multicast modes to manage video camera
broadcasts on all mesh access points. When enabled, these modes reduce unnecessary multicast
transmissions within the mesh network and conserve backhaul bandwidth.
Mesh multicast modes determine how bridging-enabled access points MAPs and RAPs send multicasts
among Ethernet LANs within a mesh network. Mesh multicast modes manage non-CAPWAP multicast
traffic only. CAPWAP multicast traffic is governed by a different mechanism.
The three mesh multicast modes are:
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Cisco Aironet 1520, 1130, 1240 Series Wireless Mesh Access Points, Design and Deployment Guide, Release 6.0
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To view the number of bronze, silver, gold, platinum, and management queues active on the
specified access point. The peak and average length of each queue are shown as well as the overflow
count.
show mesh queue-stats AP_name
Information similar to the following appears:
Queue Type Overflows
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Silver 0
Gold 0
Platinum 0
Bronze 0
Management 0
Overflows—The total number of packets dropped due to queue overflow.
Peak Length—The peak number of packets waiting in the queue during the defined statistics time
interval.
Average Length—The average number of packets waiting in the queue during the defined statistics
time interval.
Regular mode—Data is multicast across the entire mesh network and all its segments by
bridging-enabled RAPs and MAPs.
In mode—Multicast packets received from the Ethernet by a MAP are forwarded to the RAP's
Ethernet network. No additional forwarding occurs, which ensures that non-CAPWAP multicasts
received by the RAP are not sent back to the MAP Ethernet networks within the mesh network (their
point of origin), and MAP to MAP multicasts do not occur because they are filtered out.
In mode is the default mode.
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Note When an HSRP configuration is in operation on a mesh network, Cisco recommends the
In-Out multicast mode be configured.
In-out mode—The RAP and MAP both multicast but in a different manner:
If multicast packets are received at a MAP over Ethernet, they are sent to the RAP; however,
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they are not sent to other MAP over Ethernet, and the MAP to MAP packets are filtered out of
the multicast.
If multicast packets are received at a RAP over Ethernet, they are sent to all the MAPs and their
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respective Ethernet networks. When the in-out mode is in operation, it is important to properly
partition your network to ensure that a multicast sent by one RAP is not received by another
RAP on the same Ethernet segment and then sent back into the network.
Peak length Average length
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1 0.000
4 0.004
4 0.001
0 0.000
0 0.000
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