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igmp-snooping

 

List of Syntax

Syntax (EX Series and NFX Series)

Syntax (MX Series)

Syntax (QFX Series)

Syntax (SRX Series)

Syntax (EX Series and NFX Series)

Syntax (MX Series)

Syntax (QFX Series)

Syntax (SRX Series)

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 8.5.

Statement introduced in Junos OS Release 18.1R1 for SRX1500 devices.

Statement introduced in Junos OS Release 9.1 for EX Series switches.

Statement introduced in Junos OS Release 13.2 for the QFX Series.

Description

Configure IGMP snooping to constrain multicast traffic to only the ports that have receivers attached. IGMP snooping enables the device to selectively send out multicast packets on only the ports that need them. Without IGMP snooping, the device floods the packets on every port. The device listens for the exchange of IGMP messages by the device and the end hosts. In this way, the device builds an IGMP snooping table that has a list of all the ports that have requested a particular multicast group. The factory default configuration enables IGMP snooping on all VLANs.

Note

IGMP snooping must be disabled on the device before enabling ISSU.

Note

Starting with Junos OS Release 18.1R1, QFX5110 switches support IGMP snooping in an EVPN-VXLAN multihoming environment, but in this environment you must enable IGMP snooping on all VLANs associated with any configured VXLANs. You cannot selectively enable IGMP snooping only on those VLANs that might have interested listeners, because all the VXLANs share VXLAN tunnel endpoints (VTEPs) between the same multihoming peers and must have the same settings.

Default

For most devices, IGMP snooping is disabled on the device by default, and you must configure IGMP snooping parameters in this statement hierarchy to enable it on one or more VLANs.

On legacy switches that do not support the Enhanced Layer 2 Software (ELS) configuration style, IGMP snooping is enabled by default on all VLANs, and the vlan statement includes a disable option if you want to disable IGMP snooping selectively on some VLANs or disable it on all VLANs.

Options

The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.