Netgear XSM4324FS CLI Manual Software Version 12.x - Page 581
MLD Snooping Commands
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M4300 Intelligent Edge Series Fully Managed Stackable Switches MLD Snooping Commands This section describes commands used for MLD Snooping. In IPv4, Layer 2 switches can use IGMP Snooping to limit the flooding of multicast traffic by dynamically configuring Layer 2 interfaces so that multicast traffic is forwarded only to those interfaces associated with IP multicast addresses. In IPv6, MLD Snooping performs a similar function. With MLD Snooping, IPv6 multicast data is selectively forwarded to a list of ports that want to receive the data, instead of being flooded to all ports in a VLAN. This list is constructed by snooping IPv6 multicast control packets. Note: This note clarifies the prioritization of MGMD Snooping Configurations. Many of the IGMP/MLD Snooping commands are available both in the Interface and VLAN modes. Operationally the system chooses or prefers the VLAN configured values over the Interface configured values for most configurations when the interface participates in the VLAN. set mld This command enables MLD Snooping on the system (Global Config Mode) or an interface (Interface Config Mode). This command also enables MLD Snooping on a particular VLAN and enables MLD Snooping on all interfaces participating in a VLAN. If an interface has MLD Snooping enabled and you enable this interface for routing or enlist it as a member of a port-channel (LAG), MLD Snooping functionality is disabled on that interface. MLD Snooping functionality is re-enabled if you disable routing or remove port channel (LAG) membership from an interface that has MLD Snooping enabled. MLD Snooping supports the following activities: • Validation of address version, payload length consistencies and discarding of the frame upon error. • Maintenance of the forwarding table entries based on the MAC address versus the IPv6 address. • Filters out unknown IPv6 multicast packets on a VLAN if MLD snooping is enabled, with the exception of group addresses in the range ffx2::/16 and FF05::X. These control packets are always flooded to all ports in the VLAN. Default Format Mode Enabled for VLAN 1; Disabled for other VLANs. set mld vlan-id Global Config Interface Config VLAN Mode Switching Commands 581 CLI Command Reference Manual