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Cisco Bug: CSCus73932 - Multicast configuration issue on 8510 WLC OS 8.0.110.4

Last Modified

May 21, 2018

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

8.0(110.0) 8.0(110.4)

Description (partial)

Symptom:
Multicast configuration issue on 8510 WLC OS 8.0.110.4. 

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.

Conditions:
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.
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