Users Guide

Example (with
VLAN)
OS10# show ip igmp snooping mrouter vlan 3031
Interface Router Ports
vlan3031 port-channel31
Supported
Releases
10.4.0E(R1) or later
show ip igmp snooping summary
Displays the number of IGMP-enabled snooping instances.
Syntax
show ip igmp snooping summary
Parameters None
Default None
Command Mode EXEC
Usage
Information
None
Example
OS10# show ip igmp snooping summary
Maximum number of IGMP and MLD Instances: 1024
Total Number of enabled IGMP Instances: 512
Supported
Releases
10.5.2.1 or later
Multicast Listener Discovery Protocol
IPv6 networks use Multicast Listener Discovery (MLD) Protocol to manage multicast groups.
OS10 supports MLDv1and MLDv2 to manage the multicast group memberships on IPv6 networks.
MLD snooping
MLD snooping enables switches to use the information in MLD packets and generate a forwarding table that associates ports
with multicast groups. When switches receive multicast frames, they forward them to their intended receivers.
OS10 supports MLD snooping on VLAN interfaces. Effective with OS10 release 10.4.3.0, MLD snooping is enabled by default.
Configure MLD snooping
● Enable MLD snooping globally with the ipv6 mld snooping enable command in the CONFIGURATION mode. This
command enables both MLDv2 and MLDv1 snooping on all VLAN interfaces.
● (Optional) You can disable MLD snooping on specific VLAN interfaces using the no ipv6 mld snooping command in the
VLAN INTERFACE mode.
● (Optional) Multicast flood control is enabled by default. To disable the multicast flood restrict feature, use the no
multicast snooping flood-restrict command in CONFIGURATION mode. To reenable the feature globally, use
the ip igmp snooping enable command in CONFIGURATION mode.
● In a network, the snooping switch is connected to a multicast Router that sends MLD queries. On a Layer 2 network that
does not have a multicast router, you can configure the snooping switch to act as querier. Use the ipv6 mld snooping
querier command in the VLAN INTERFACE mode to send the queries.
● OS10 learns the multicast router interface dynamically based on the interface on which MLD membership query is received.
To assign a multicast router interface statically, use the ipv6 mld snooping mrouter interface interface—
type command in VLAN INTERFACE mode.
● (Optional) Configure the MLD version using the ipv6 mld version version-number command in the VLAN
INTERFACE mode.
1040
Multicast