ZyXEL GS1510-24 User Guide - Page 73
IGMP Snooping
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CHAPTER 12 IGMP Snooping 12.1 Overview This chapter shows you how to configure IGMP snooping for multicast traffic. The Switch can passively snoop on IGMP packets transferred between IP multicast routers/switches and IP multicast hosts to learn the IP multicast group membership. IGMP snooping allows the Switch to learn multicast groups without you having to manually configure them. 12.2 What You Can Do • Use the General Settings screen (Section 12.4 on page 74) to enable IGMP snooping. • Use the Port Settings screen (Section 12.5 on page 75) to enable or disable immediate leave on ports. 12.3 What You Need to Know The Switch can passively snoop on IGMP packets transferred between IP multicast routers/switches and IP multicast hosts to learn the IP multicast group membership. It checks IGMP packets passing through it, picks out the group registration information, and configures multicasting accordingly. IGMP snooping allows the Switch to learn multicast groups without you having to manually configure them. The Switch forwards multicast traffic destined for multicast groups (that it has learned from IGMP snooping or that you have manually configured) to ports that are members of that group. IGMP snooping generates no additional network traffic, allowing you to significantly reduce multicast traffic passing through your Switch. GS1510 Series User's Guide 73