Configuration Guide User guide

1506 FastIron Configuration Guide
53-1002494-02
Displaying IGMP snooping information
If the tracking and fast leave features are enabled, you can display the list of clients that belong to
a particular group by entering the following command.
Syntax: show ip multicast group [<group-address> [detail] [tracking]]
If you want a report for a specific multicast group, enter that group's address for <group-address>.
Enter detail to display the source list of a specific VLAN.
Enter tracking for information on interfaces that have tracking enabled.
The following table describes the information displayed by the show ip multicast group command.
Field Description
group The address of the group (destination address in this case, 224.1.1.1)
p-port The physical port on which the group membership was received.
ST Yes indicates that the IGMP group was configured as a static group; No means the address
was learned from reports.
QR Yes means the port is a querier port; No means it is not. A port becomes a non-querier port
when it receives a query from a source with a lower source IP address than the device.
life The number of seconds the group can remain in EXCLUDE mode. An EXCLUDE mode changes
to INCLUDE mode if it does not receive an "IS_EX" or "TO_EX" message during a certain period
of time. The default is 140 seconds. There is no life displayed in INCLUDE mode.
mode Indicates current mode of the interface: INCLUDE or EXCLUDE. If the interface is in INCLUDE
mode, it admits traffic only from the source list. If an interface is in EXCLUDE mode, it denies
traffic from the source list and accepts the rest.
source Identifies the source list that will be included or excluded on the interface.
For example, if an IGMPv2 group is in EXCLUDE mode with a source of 0, the group excludes
traffic from the 0 (zero) source list, which actually means that all traffic sources are included.
Brocade# show ip multicast group 224.1.1.1 tracking
Display group 224.1.1.1 in all interfaces with tracking enabled.
p-:physical, ST:static, QR:querier, EX:exclude, IN:include, Y:yes, N:no
VL70 : 1 groups, 1 group-port, tracking_enabled
group p-port ST QR life mode source
*** Note: has 1 static groups to the entire vlan, not displayed here
1 224.1.1.1 0/1/33 no yes 100 EX 0
receive reports from 1 clients: (age)
(2.2.100.2 60)