63
2 | 0 0 0 0 1 1 1 1 1 1
3 | 1 1 2 2 2 2 2 2 2 2
4 | 2 2 2 2 2 2 2 2 3 3
5 | 3 3 3 3 3 3 3 3 3 3
6 | 3 3 3 3
3.7.
Multicast Filtering
For multicast filtering, the device uses IGMP Snooping technology. The IGMP
(Internet Group Management Protocol) is an Internet Protocol that provides a
way for an internet device to report its multicast group membership to adjacent
routers. Multicasting allows one computer on the internet to send data to a
multitude of other computers that have identified themselves as being
interested in receiving the originating computers data.
Multicasting is useful for such applications as updating the address books of
mobile computer users in the field, sending out newsletters to a distribution list,
and broadcasting streaming media to an audience that has tuned into the event
by setting up multicast group membership.
In effect, IGMP Snooping manages multicast traffic by making use of switches,
routers, and hosts that support IGMP. Enabling IGMP Snooping allows the ports
to detect IGMP queries, report packets, and manage multicast traffic through the
switch. IGMP has three fundamental types of messages, as shown below:
Message
Description
Query
A message sent from the querier (an IGMP router or a switch) which
asks for a response from each host that belongs to the multicast group.
Report
A message sent by a host to the querier to indicate that the host wants
to be or is a member of a given group indicated in the report message.
Leave Group A message sent by a host to the querier to indicate that the host has
quit as a member of a specific multicast group.
You can enable IGMP Snooping and IGMP Query functions here. You will see the
information of the IGMP Snooping function in this section, including different
multicast member ports and IP multicast addresses that range from 224.0.0.0
to 239.255.255.255.
3.7.1.
IGMP Snooping
This page is to enable/disable the IGMP Snooping feature and view the IGMP
