AirLive SNMP-FSH2602MG User’s Manual
35
Figure 4-14 IGMP Snooping
The Internet Group Management Protocol (IGMP) is an internal protocol of the Internet
Protocol (IP) suite.
IP manages multicast traffic by using switches, routers, and hosts that support IGMP.
Enabling IGMP allows the ports to detect IGMP queries and report packets and manage IP
multicast traffic through the switch. IGMP have three fundamental types of message as
follows:
Message
Description
Query
A message sent from the queries (IGMP router or switch) asking for a
response from each host belonging multicast group.
Report
A message sent by a host to the queries 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 queries to indicate that the host has
quit being a member of a specific multicast group.
Table 4-1 IGMP Snooping Messages
Static MAC Address
When you add a static MAC address, it remains in the switch's address table, regardless of
whether the device is physically connected to the switch. This saves the switch from having
to re-learn a device's MAC address when the disconnected or powered-off device is active
on the network again.
