Alloy Computer Products POEGEM12T2SFP user manual Igmp Snooping, Snooping Mode, Default Disable

POEGEM12T2SFP User Manual

3-8. IGMP Snooping

IGMP Snooping is used to establish multicast groups to forward multicast packets to each of the multicast member ports, and, in nature, avoids wasting bandwidth with IP multicast packets. If a switch does not support IGMP or IGMP Snooping it can not tell a multicast packet from a broadcast packet, so it will treat them all as broadcast packets. Without IGMP Snooping, multicast packets are treated as broadcast packets, therefore increasing the overall traffic on your network.

The POEGEM12T2SFP support all functions of IGMP Snooping including query, report and leave. IGMP Snooping is used by the switch to learn who belongs to a multicast group and also update the multicast table within the switch with new multicast members. Once the switch has learned who belongs to the multicast group all packets forwarded to a multicast address will be forwarded to all members belonging to the multicast group.

Fig. 3-29

Function name:

IGMP Snooping

Function description:

IGMP is used to snoop the status of IP multicast groups and display its associated information in both tagged VLAN and non-tagged VLAN networks. By enabling IGMP with either passive or active mode, you can monitor the IGMP snooping information, which contains information about the multicast member list including the multicast groups, VID and member ports.

Parameters description:

Snooping Mode:

The POEGEM12T2SFP support both Active and Passive modes, IGMP can also be disabled.

Default: Disable

Disable:

To disable IGMP select the disable radio button and click Apply.

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