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MLD Snooping Commands
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.
◆
Flooding of unregistered multicast data packets to all ports in the VLAN.
Default
disabled
Format
set mld
vlanid
Summary of Contents for CN1610
Page 3: ......
Page 31: ...28 Accessing the CLI ...
Page 309: ...306 Remote Monitoring Commands ...
Page 473: ...470 Port Mirroring Commands 100 ...
Page 487: ...484 DHCP L2 Relay Agent Commands Mode Privileged EXEC ...
Page 607: ...604 IPv6 Management Commands ...