Situation

# Zyxel 2220-54 使用IGMP-Snooping來偵測多播流量並減少CPU使用率
Zyxel 2220-54 uses IGMP snooping to manage multicast traffic and reduce unnecessary load on the network and routers.

Configuration

[1] 
Login WebUI > Multicast > IPv4 Multicast 

[2]
IGMP Snooping
# 啟動IGMP Snooping
> Active Enable 

# 如果沒有PIM Router或是IGMP Proxy最好開啟Querier
> Querier Enable

# 收到leave group的訊息後，直接刪除membership而不再傳送Query問還有沒有人需要
> Fast Leave Enable