Cisco Cisco 2504 Wireless Controller 문제 해결 가이드

representative VLAN for flow of all IGMP and multicast over the air.

Configuration:

CLI: config wlan multicast interface <wlan−id> enable <interface name>

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GUI:

Note: This configuration is allowed only when IGMP snooping is enabled.

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Just like L3 Multicast optimization, L2 multicast and broadcast optimization is very important with the VLAN
Select feature. Additional commands were added in release 7.0.116 and above in order to optimize L2
multicasts and broadcasts.

L2 Multicast/ Broadcast use L2 MGID in order to forward the packet to the AP. L2 Multicast/Broadcast from
all the VLANs in the group will be sent on the WLAN. This causes duplication packets on AIR.

In order to limit these duplications, L2 Multicast/Broadcast enabling/disabling per interface was introduced.

CLI: Enable/Disable L2 Multicast and Broadcast for the interface:

(WLC) >config network multicast l2mcast <enable/disable> <interface−name>

Note: This command is applicable only for 5508, 2500, 7500, and WiSM−2 controllers.

Note: GUI support for enabling/disabling L2 multicast/broadcast per interface is not available in this release.

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