IGMP Snooping

IGMP snooping constrains IPv4 multicast traffic at Layer 2 by listening to IGMP messages exchanged between hosts and routers. The global ip igmp snooping settings are configured under the igmp_snooping section and cover optimized multicast flooding, snooping on VXLAN VLANs, the NVE static router port, and dropping unknown multicast traffic on VXLAN VLANs. Per-VLAN IGMP snooping settings from vlan configuration <id> mode, such as the querier, timers, fast-leave, mrouter interfaces and static groups, are configured under vlan.configurations[].igmp_snooping (see the VLAN page).

Diagram

Classes

nxos

Name	Type	Constraint	Mandatory	Default Value
devices	List	devices	No
device_groups	List	device_groups	No
global	Class	global	No
templates	List	templates	No

devices (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

device_groups (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

global (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

templates (nxos)

Name	Type	Constraint	Mandatory	Default Value
configuration	Class	configuration	No

configuration (nxos.devices)

Name	Type	Constraint	Mandatory	Default Value
igmp_snooping	Class	igmp_snooping	No

igmp_snooping (nxos.devices.configuration)

Name	Type	Constraint	Mandatory	Default Value
optimise_multicast_flood	Boolean	true, false	No
vxlan	Boolean	true, false	No
disable_nve_static_router_port	Boolean	true, false	No
vxlan_umc_drop_vlan	Class	vxlan_umc_drop_vlan	No

vxlan_umc_drop_vlan (nxos.devices.configuration.igmp_snooping)

Name	Type	Constraint	Mandatory	Default Value
ids	List	Integer[min: 1, max: 4094]	No
ranges	List	ranges	No

ranges (nxos.devices.configuration.igmp_snooping.vxlan_umc_drop_vlan)

Name	Type	Constraint	Mandatory	Default Value
from	Integer	min: 1, max: 4094	Yes
to	Integer	min: 1, max: 4094	Yes

Examples

Example 1: Enable IGMP snooping on VXLAN VLANs

nxos:
  devices:
    - name: LEAF1
      configuration:
        feature:
          nv_overlay: true
        igmp_snooping:
          vxlan: true

Example 2: Optimized multicast flooding with the NVE static router port disabled

nxos:
  devices:
    - name: LEAF1
      configuration:
        feature:
          nv_overlay: true
        igmp_snooping:
          optimise_multicast_flood: true
          vxlan: true
          disable_nve_static_router_port: true

Example 3: Drop unknown multicast traffic on a range of VXLAN VLANs

nxos:
  devices:
    - name: LEAF1
      configuration:
        feature:
          nv_overlay: true
        igmp_snooping:
          vxlan: true
          vxlan_umc_drop_vlan:
            ids:
              - 100
            ranges:
              - from: 200
                to: 299