IGMP Snooping


By snooping IGMP messages, it is possible to determine the (local) port membership for multicast groups. It is also possible to include the logical ports associated with VXLAN tunnels and their remote VTEPs when IGMP messages snoop on remote overlay network nodes.


There are features and functions used in Arista NetVisor UNUM and Insight Analytics that are common throughout the user interface (UI). Please refer to the Common Functions section for more information on the use of these functions and features.


Selecting Manager → Layer 2 → IGMP Snooping displays the  IGMP Snooping dashboard with a list of any existing entries. 


Select the applicable Fabric from the left-hand navigation bar and the dashboard updates showing all IGMP Snooping entries from all switches within the Fabric


Note: If no entries exist a "No Data Exists" message is displayed. You must first configure an entry on a switch. Prerequisite settings and configuration may be required.


The dashboard displays a list of existing IGMP Snooping entries by Fabric.


Additional parameters include: Switch, Scope, Enable, NetVisor OS Managed VLAN, Interop v2 VLAN, Enable VLAN, VXLAN, Snoop Linklocal VLAN, No Snoop Linklocal VLAN, IGMPv3 VLAN, IGMPv2 VLAN, Query Interval and, Query Max Response Time.


Manage IGMP Snooping Fabric Dashboard


Select the applicable switch from the fabric and the dashboard updates automatically with IGMP Snooping settings.


The dashboard displays a list of existing IGMP Snooping entries from the switch. 


Additional parameters include: Scope, Enable, NetVisor OS Managed VLAN, Interop v2 VLAN, Enable VLAN, VXLAN, Snoop Linklocal VLAN, No Snoop Linklocal VLAN, Igmpv3 VLAN, Igmpv2 VLAN, Query Interval and, Query Max Response Time.


Manage IGMP Snooping Switch Dashboard


Modify IGMP Snooping


Change settings by selecting Edit using the Cog icon.


Enter the applicable settings to make changes to the IGMP Snooping parameters which include:


Scope – IGMP snooping scope - fabric or local.

Enable – (checkbox) - Enable or disable IGMP snooping.

Enable VLAN – Enable per VLAN IGMP snooping.

VXLAN – (checkbox) - Enable or disable IGMP snooping on vxlans.

Snoop Linklocal VLAN – Allow snooping of link-local groups(224.0.0.0/24) on these vlans.

No Snoop Linklocal VLAN – Remove snooping of link-local groups(224.0.0.0/24) on these vlans.

Igmpv3 VLAN – VLANs on which to use IGMPv3 protocol.

Igmpv2 VLAN – VLANs on which to use IGMPv2 protocol.

Query Interval – IGMP query interval in seconds.

Query Max Response Time – Maximum response time, in seconds, advertised in IGMP queries.


Manage IGMP Snooping Modify Settings


Click Save to continue or Cancel to return to the previous screen without making any changes.


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