Users Guide

Table Of Contents
Multicast flood control commands
multicast snooping flood-restrict
Enables multicast snooping flood control for IGMP snooping and MLD snooping.
Syntax
multicast snooping flood-restrict
The no version of this command disables multicast flood control.
Parameters None
Default Enabled
Command Mode CONFIGURATION
Usage
Information
Multicast snooping flood control, IGMP snooping, and MLD snooping are enabled by default.
For multicast flood restrict to be effective on a VLAN, IGMP snooping and MLD snooping must be
enabled at both global and VLAN levels.
To disable multicast snooping flood control, use the no multicast snooping flood-restrict
command.
Example
OS10(config)# multicast snooping flood-restrict
Supported
Releases
10.4.3.0 or later
Multicast snooping on VLANs
OS10 supports multicast snooping (IGMP and MLD snooping) on all the supported platforms in the Full Switch Mode and the
SmartFabric Services Mode. Starting from Release 10.5.2.1 and later releases:
OS10 supports multicast snooping with VLAN scale profile configuration. However, this support is not available on the
S4200-ON series switches.
To enable the snooping querier functionality on scaled VLANs, you must use the mode l3 command.
With scale profile VLAN configuration, multicast snooping is enabled only at the global level and disabled at the per VLAN
interface level.
Multicast snooping is supported on a maximum of 512 VLANs or 1024 instances (IGMP snooping on 512 VLANs and MLD
snooping on 512 VLANs). If there are more than 1024 instances, multicast snooping is disabled on the remaining VLANs. A
syslog message similar to the following appears:
IGMP/MLD Snooping instance limit exceeded. IGMP/MLD snooping would not be enabled on
further vlans.
When the number of configured VLAN instances goes below 1024, a syslog message similar to the following appears:
IGMP/MLD Snooping instance limit receded.IGMP/MLD snooping can be enabled on some
vlans.
Upgrade from an earlier release to Release 10.5.2.1 introduces the following changes. The following table indicates the multicast
snooping configuration setting at the global level and at the per VLAN interface level pre and post upgrade.
Table 76. Full Switch Mode
Scale
profile
VLAN
configur
ation
Upgrade from 10.5.0.x or earlier to
10.5.2.1 or later
Upgrade from 10.5.1.0 to 10.5.2.1 or later Restrictions
Disabled Pre Upgrade Post Upgrade Pre Upgrade Post Upgrade OS10 supports
multicast
Multicast 1093