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Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) are both communications protocols that are used to establish Multicast Memberships. An IP Multicast Group is an address used in multicasting to allow the transmission of a packet to multiple destinations through the transmission of one packet. An IGMP/MLD IP Multicast Group searches for members of an IP Multicast Group with IGMP/MLD. The restriction of the search of the IP Multicast Group to IGMP/MLD ensures that the packets that are sent are from the internal side of the network rather than the external, where different protocols are used for multicasting.
This article explains how to configure IGMP/MLD IP multicast on ESW2-350G Switches.
Step 1. Log in to the web configuration utility and choose Multicast > IGMP/MLD IP Multicast Group . The IGMP/MLD IP Multicast Group page opens:
Step 2. From the Dynamic IP Group Type drop-down list, choose to snoop for either IGMP or MLD. Snooping helps analyze packets sent over the Multicast network and filter them so that IGMP/MLD packets are sent only to hosts interested in the packets.
• IGMP — Communications protocol used to establish multicast group memberships with IPv4.
• MLD — Communications protocol used to establish multicast group memberships with IPv6.
Step 3. Check the check box to the left of Group Address Equals To to enable search for Multicast Groups by MAC address or by IP address.
Step 4. In the Group Address equals to field, enter the MAC or IP address of the Multicast Group you wish to snoop for.
Step 5. Check the check box to the left of Source Address Equals To to enable search for Multicast Groups by sender address.
Step 6. In the Source Address Equals To field, enter the IP address of the Multicast group sender you wish to snoop for.
Step 7. Check the check box to the left of VLAN ID Equals To to enable search for Multicast Groups by VLAN ID.
Step 8. From the VLAN ID Equals To drop-down list, choose the VLAN ID of the Multicast Group you wish to snoop for.
Step 9. Click Go to apply the settings.
Step 10. (Optional) Click Clear Filter to clear the settings.