Managing Group Members - Fujitsu XG0224 User Manual

XG Series User's Guide
4.8.3

Managing Group Members

When network congestion causes Leave message loss or there is a host that uses IGMPv1, the multicast router does not
receive Leave messages. The multicast router sends out an IGMP General Query message to all hosts (IP address:
224.0.0.1) at intervals (query interval) to determine membership information.
Upon reception of an IGMP General Query message, the host, a member of the group, returns an IGMP Report message to
maintain membership in the group.
IGMP General Query
IGMP General Query
MAC : 0100.5E01.0001
MAC : 0100.5E01.0001
Destination IP : 224.0.0.1
Destination IP : 224.0.0.1
Group IP : 0.0.0.0
Group IP : 0.0.0.0
XG
Port 1
Terminal 1
In consideration of General Query or Report message loss caused by network congestion, since RFC 2236 defines the
default query interval for multicast routers as 125 seconds, this device uses 126 seconds for the group member interval
when it works as a Querier.
Multicast Router
VLAN 10
Port 8
IGMP snooping Control Table
0100.0501.0203
VLAN (Router Port)
10 (8)
Port 2 Port 3
Terminal 2

Managing Group Members

80
Chapter 4 Switch Functions and their Configuration
Port
1, 8
Group IP (MAC address)
(01:00:05:01:02:03)
239.1.2.3
Terminal 3
Port Reporter
1 192.168.10.20
IGMP Snooping