Igmp Snooping; Enabling Igmp Snooping - Dell Force10 S2410-01-10GE-24P Configuration Manual

IGMP Snooping

This chapter discusses the use of IGMP (Internet Group Management Protocol) commands for IGMP
Snooping, in the following major sections:
• Enabling IGMP Snooping on page 237
• Monitoring IGMP Snooping on page 238
See also IGMP Proxy on page 251
IGMP in SFTOS:
• Uses Version 3 of IGMP
• Includes IGMP Snooping that can be enabled per VLAN
Typically, a switch employing IGMP forwards multicast packets out all ports in a VLAN until it receives
an IGMP membership report. The IGMP Snooping feature enables the switch to monitor IGMP
transactions between hosts and routers. It can help to conserve bandwidth by allowing the switch to
forward IP multicast traffic only to connected hosts that request multicast traffic.

Enabling IGMP Snooping

1.From Global Config mode, enable IGMP Snooping on the switch:
igmp enable (in SFTOS Version 2.2, use set igmp)
2.From Interface VLAN mode, enable IGMP Snooping on the selected VLAN:
igmp enable (in SFTOS Version 2.2, use set igmp vlanid in VLAN database
mode)
3.Enable IGMP Snooping on all interfaces:
igmp interfacemode enable all (in SFTOS Version 2.2, use set igmp
interfacemode)
4.Commands to configure timers:
set igmp groupmembership-interval 2-3600
in the Routing chapter of this guide.
— Default 125 seconds
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