EnGenius EGS7228P User Manual download pdf (Page 64)

VLAN Settings

UsetheIGMPSnoopingVLANSettingstocongureIGMP

Snooping settings for VLANs on the system. The Switch

performs IGMP Snooping on VLANs that send IGMP

packets. You can specify the VLANs that IGMP Snooping

should be performed on. Choose from the drop-down

box whether to Enable or Disable IGMP Snooping. Next,

choose to Enable or Disable Fast Leave for the VLAN ID.

Click the Apply button to accept the changes or the

Cancel button to discard them.

VLAN ID:

Displays the VLAN ID.

IGMP Snooping Status: Enables or Disables the IGMP snooping

featureforthespeciedVLANID.

Fast Leave: Enables or Disables the IGMP snooping

FastLeaveforthespeciedVLANID.

Enabling this feature allows the Switch

to immediately remove the Layer 2

LAN port from its forwarding table

entry upon receiving an IGMP leave

messagewithoutrstsendingout

IGMPgroup-specic(GS)queriestothe

port.

If Fast Leave is not used, a multicast querier will send

a GS-query message when an IGMPv2/v3 group leave

messageisreceived.Thequerierstopsforwardingtrafc

for that group only if no host replies to the query within

thespeciedtimeoutperiod.IfFastLeaveisenabled,the

Switch assumes that only one host is connected to the

port. Therefore, Fast Leave should only be enabled on a

port if it is connected to only one IGMP-enabled device.

Fast Leave is supported only with IGMPv2 or IGMPv3

Snooping when IGMP Snooping is enabled. Fast Leave

does not apply to a port if the Switch has learned that a

multicast querier is attached to it.

Fast Leave can improve bandwidth usage for a network

which frequently experiences many IGMP host add and

leave requests.

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EnGenius EGS7228P User Manual Page 64