ZyXEL MI-7248 User Guide - Page 187
Application > IGMP, IP Setup
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CHAPTER 32 IGMP 32.1 IGMP IGMP (Internet Group Multicast Protocol) is a session-layer protocol used to establish membership in a multicast group. It is not used to carry user data. See RFC 1112 and RFC 2236 for information on IGMP versions 1 and 2, respectively. To open this screen, click IP Application > IGMP. Each entry in the table is automatically created when you configure a new IP domain in the IP Setup screen. See Section 10.2 on page 73. Figure 82 IGMP The following table describes the labels in this screen. Table 69 IGMP LABEL DESCRIPTION Active Select this check box to enable IGMP on the switch. Unknown Multicast Frame Index Network Version Note: You cannot enable both IGMP snooping and IGMP at the same time. Specify the action to perform when the switch receives an unknown multicast frame. Select Drop to discard the frame(s). Select Flooding to send the frame(s) to all ports. This field displays an index number of an entry. This field displays the IP domain configured on the switch. See Section 10.2 on page 73 for more information on configuring IP domains. Select an IGMP version from the drop-down list box. Choices are IGMP-v1, IGMP-v2, IGMP-v3 and None. The switch supports both IGMP version 1 (IGMP-v1), version 2 (IGMP-v2) and version 3 (IGMP-v3). At start up, the switch queries all directly connected networks to gather group membership. After that, the switch periodically updates this information. MS-7206 User's Guide 187