Igmp And Mld Snooping; Basic Configuration - ZyXEL Communications MGS3600-24F User Manual

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7.7 IGMP and MLD Snooping

Use the IGMP Snooping and
Without snooping, the switch can't tell which ports have multicast listeners connected to them, so the switch floods multicast packets to all ports.
Each multicast listener must send a join packet to the local multicast router to receive multicast data via the router. The switch snoops on these join
packets to build a table associating multicast destination addresses with destination ports, so each multicast packet can be selectively forwarded
only to those ports associated with its destination multicast address. This saves bandwidth on the switch and processor power on non-member
hosts. The switch can also use this table to function as an IGMP/MLD proxy, so only the first member to join and the last member to leave a multi-
cast group trigger join and leave packets toward the multicast router. This saves memory and processing power on the router because it only has
to process one join or leave packet.

7.7.1 Basic Configuration

Use the Basic Configuration
To configure basic IGMP and MLD snooping parameters:
1. Click Configuration >
2. Configure the IGMP or MLD parameters.
3. Click Save.
Parameter description
Basic configuration parameters consist of global and port-specific parameters for IGMP and MLD snooping.
IGMP or MLD Snooping Configuration
Snooping Enabled:

Use this check box to globally enable or disable IGMP or MLD snooping.
Unregistered IPMCv4

MGS3600-24F/XGS3600-26F/XGS3600-28F
MLD Snooping sub-menus to configure selective forwarding of IPv4 and IPv6 multicast packets.
sub-menu to configure global and port-specific parameters for IGMP and MLD snooping.
IGMP Snooping or MLD Snooping
or IPMCv6 Flooding Enabled:
> Basic Configuration.
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