fyi... igmp would not disable the mcast from reaching the switch... it will enable to switch to listen and put the the switch ports into a list... so that only a port requesting the mcast will receive it... for your router starting around page 45 through page 54 search for igmp snooping
https://downloads.avaya.com/css/P8/documents/100103076 Hakuna Matatta ..
ldm-users
archives: