Add new comment
And to be extra clear, it is IGMP Snooping that must be disabled:
IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic. The feature allows a network switch to listen in on the IGMP conversation between hosts and routers. By listening to these conversations the switch maintains a map of which links need which IP multicast streams.
Some brands allow a setting PER VLAN.
Cisco may require dedicated/proprietary tool (Cisco Network Assistant) as the built-in web GUI is limited in functionality.
Ohh, I just noticed that the screenshot that I had added to this answer is missing. :D
I don't know, but you must remove any multicast limiting functions from a switch/VLAN you intend to use for RNRP.
RNRP will tell you if you made the correct choice since its highly dependant on the multicasts to be forwarded to every port, always.
Cisco has a per-VLAN setting which is not normally shown in the GUI, you must then use the proprietary Cisco Network Assistant tool. This why I chose to use a screenshot from Cisco in the SHC section 4.4.4.
On the ABB intranet, you can download the SHC from: