IGMP Snooping
IGMP Snooping allows switches to identify which ports multicast group members hosts are
attached to, in order to optimize the distribution of multicast traffic.
Some common use-cases for IGMP Snooping are:
- The ability to configure IGMP
Snooping on switches for specific VLANs.
- The ability to globally enable
the feature for all edge switches in specific VLANs assigned to a network
policy.
- The ability to support IGMP
Snooping to be disabled using switch template VLAN attributes override or device
level configuration override.
The IGMP Snooping feature can be configured in multiple locations, in an overriding
hierarchy, listed in order of priority:
- Device Specific VLAN
configuration
- VLAN attributes screen
- Device templates
- Common settings
When IGMP Snooping is not configured, the higher-level settings take effect. For
example, if device specific VLAN IGMP settings are set to
disabled, the VLAN
attributes settings for the VLAN take effect.
