Allied Telesis AR400 - Manual (Page 103)

Page 103 | AlliedWare™ OS How To Note: IGMP
IGMP debugging > Example
IGMP debugging
In this section, we shall examine the debugging messages that the router or switch outputs
when certain events occur while debugging is enabled. To enable debugging, use the
command:
enable ip igmp debug
Example
This example uses the same network configuration as "IGMP snooping" on page 9 . For
convenience, the diagram is reproduced below.
Client 2 sends a Membership Report for group 224.12.13.14. Switch 1 sees the report on
vlan100 (port 49), and adds the port to its IGMP and IGMP snooping tables.
Note that the debugging output does not identify which client sent the Membership Report.
X A client joins a group
Multicast Server
AT-8948
Switch 1:
Querier
Rapier 24i
Switch 2:
Snooper
Client 1
Rapier 24i
Switch 3:
Snooper
Client 2
port 1
port 2 port 3
port 25 port 25
port 26 port 26
port 50
(blocked by STP)
port 49
igmp-snooper.eps
Manager Switch 1> IGMP Snoop(48): Report -> snooped group 224.12.13.14 added
Adding port 49 for group 224.12.13.14 on vlan100
IGMP Rx(48): Report -> group 224.12.13.14 added