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Cisco Bug: CSCus73932 - Multicast configuration issue on 8510 WLC OS

Last Modified

Feb 04, 2019

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

8.0(110.0) 8.0(110.4)

Description (partial)

Multicast configuration issue on 8510 WLC OS 

Global IPV6 is disable and Only IPv4 need multicast. Multicast mode Multicast-Multicast is already configured for IPv4.

When enable multicast at Controller>Multicast>Enable Global multicast Mode or via command line "config network multicast global enable" prompt the message " Multicast-unicast mode does not support IGMP/MLD Snooping. Config mode to Multicast-Multicast first.

It keeps prompting one or other message but never configure Multicast. No matter what you configure it never changes IPV6 Multicast-Multicast either via CLI or GUI.

When configuring multicast on 8510, multicast->unicast mode is not possible due to the possibility of huge number of multicast capwap tunnels. multicast->multicast is the only recommended mode on 8510.

The above works when ipv6 mode has been set to unicast. By default there is none of the below config on WLC->

config ipv6 multicast mode multicast 

config ipv6 multicast mode unicast

If you enable multicast->unicast for ipv6, and then try to enable global multicast, 8510 will not let you, due to ipv6. This will happen even if ipv6 is disabled.

Related Community Discussions

<key>CSCus73932</key> - Multicast configuration issue on 8510 WLC OS
Hi has anybody tried this Workaround already? After modification of the config file I am able to enable global multicast. Unfortunately it is not possible to set AP Multicast Mode to Unicast if global multicast is enabled. To make multicast work on local APs I am afraid I have to set the mode to multicast-unicast. Regards, Urs
Latest activity: Mar 02, 2015
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