User's Manual

Table Of Contents
Users Manual of SGS-5240 Series Managed Switch
105
4.2.11.1 Global Setting
Switch Management> IGMP Snooping>Global Setting page is used to configure the switch to forward multicast traffic.
IGMP Snooping Status When enabled, the switch will monitor network traffic to determine which hosts want to receive
multicast traffic. This is referred to as IGMP Snooping. (Default: Disabled)
When IGMP snooping is enabled globally, the per VLAN interface settings for IGMP snooping take precedence.
When IGMP snooping is disabled globally, snooping can still be configured per VLAN interface, but the interface settings
will not take effect until snooping is re-enabled globally.
Proxy Reporting Status Enables IGMP Snooping with Proxy Reporting. (Default: Disabled)
When proxy reporting is enabled with this command, the switch performs “IGMP Snooping with Proxy Reporting” (as
defined in DSL Forum TR-101, April 2006), including last leave, and query suppression. Last leave sends out a proxy
query when the last member leaves a multicast group, and query suppression means that specific queries are not
forwarded from an upstream multicast router to hosts downstream from this device. When proxy reporting is disabled, all
IGMP reports received by the switch are forwarded natively to the upstream multicast routers.
TCN Flood Enables flooding of multicast traffic if a spanning tree topology change notification (TCN) occurs. (Default:
Disabled)
TCN Query Solicit Sends out an IGMP general query solicitation when a spanning tree topology change
notification (TCN) occurs. (Default: Disabled)
Router Alert Option Discards any IGMPv2/v3 packets that do not include the Router Alert option. (Default:
Disabled)
Unregistered Data Flooding Floods unregistered multicast traffic into the attached VLAN. (Default: Disabled)