What is IGMP snooping querier?

The IGMP/MLD Snooping Querier is used to support a Layer 2 Multicast domain of snooping switches in the absence of a Multicast router. For example, where Multicast content is provided by a local server, but the router (if one exists) on that network does not support Multicast.

What is IGMP querier address?

By default, the source IP address of IGMP Query messages sent by the IGMP snooping querier is 192.168. 0.1.

Does IGMP snooping need to be enabled on all switches?

Unmanaged switches do not need this configuration and are designed to work without needing setup. A managed switch will allow configuration of IGMP Snooping, IGMP Querying, VLAN set up, and much more. Therefore, you must have a managed switch if you’re using IGMP Snooping.

How is an IGMP querier elected?

Querier election process: when there are two routers in the same subnet then only one of them should send query messages. The election ensures only one router becomes the active querier. The router with the lowest IP address becomes the active querier.

How do I set IGMP querier?

To run the IGMP Snooping querier on a VLAN, you have to enable it globally and on the VLAN. To enable IGMP snooping on a specific VLAN, use the ip igmp snooping vlan enable command in switch configuration mode. To return to the default, use the no form of this command. IGMP snooping can be enabled only on static VLANs.

How do I set up IGMP querier?

How do I check my IGMP querier?

Which router is elected the IGMP querier when more than one router is in the same LAN segment?

If there are multiple queriers (routers) on the subnet, a designated router (DR) is elected using PIM to avoid sending duplicate multicast packets. The elected querier is the router with the highest IP address.

How do I know if IGMP snooping is working?

— Use the debug ip igmp snooping vlan command to determine if IGMP snooping is working as expected. Examine the output to see if the port is receiving the IGMP report and if the interface has been added to the multicast traffic interface list for the VM.

Is IGMP snooping enabled by default?

IGMP snooping is enabled on all VLANs by default, but can be enabled and disabled on a per-VLAN basis. Global IGMP snooping overrides the VLAN IGMP snooping. If global snooping is disabled, you cannot enable VLAN snooping.

How do I enable IGMP on a VLAN?

Does multicast across VLANs?

Simply enabling the Multicast protocol on one VLAN will work if Airtames and PCs are on the same VLAN but in the case that Airtames and PCs are on different VLANs, the multicast traffic will need to cross VLANs.

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