Name: Cisco 4400 Series
Brand: Cisco
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8-38

Cisco Wireless LAN Controller Configuration Guide

OL-17037-01

Chapter 8 Controlling Mesh Access Points

Configuring Advanced Features

The three mesh multicast modes are:

• 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.

• 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,

they are not sent to other MAP Ethernets, 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

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.

Note If 802.11b clients need to receive CAPWAP multicasts, then multicast must be enabled

globally on the controller as well as on the mesh network (using the config network

multicast global enable CLI command). If multicast does not need to extend to 802.11b

clients beyond the mesh network, the global multicast parameter should be disabled (using

the config network multicast global disable CLI command).

Using the CLI to Enable Multicast on the Mesh Network

• To enable multicast mode on the mesh network to receive multicasts from beyond the mesh

networks, enter these commands:

config network multicast global enable

config mesh multicast {regular | in | in-out}

• To enable multicast mode only the mesh network (multicasts do not need to extend to 802.11b

clients beyond the mesh network), enter these commands:

config network multicast global disable

config mesh multicast {regular | in | in-out}

Note Multicast for mesh networks cannot be enabled using the controller GUI.

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