Figure 8 Switch!B!and!Switch!D!only.
*IGMP Querier Mode: Auto allows non-queriers to forward join/leave request
towards direction of the querier.
Once you have determined the path of the IGMP join/leave requests, go to
step 6.
Can the querier or Zyxel switch directly connected to the
multicast server perform Layer 3 IGMP Routing?
Layer 3 IGMP Routing and Layer 2 IGMP Snooping have very different configurations
available. If the querier is also the gateway of the local clients, then use Layer 3
IGMP Routing.
If the querier is using Layer 3 IGMP Routing, proceed to the Layer 3 IGMP Routing
section.
If the querier is not capable of using Layer 3 IGMP Routing, proceed to the Layer 2
IGMP Snooping section.