Brocade TurboIron 24X Series Configuration Guide - Manual (Page 819)

Brocade TurboIron 24X Series Configuration Guide 785
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IGMP snooping show commands
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.
Displaying IGMP snooping mcache information
The IGMP snooping mcache contains multicast forwarding information for VLANs. To display
information in the multicast forwarding mcache, enter the following command.
Syntax: show ip multicast mcache
The following table describes the output of the show ip multicast mcache command.
Table 0.5:
This field... Displays...
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 260 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 IGMP V2 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.
Table 0.6:
This field... Displays...
(source group) Source and group addresses of this data stream. (* group) means match group only; (source
group) means match both.
cnt The number of packets processed in software. Packets are switched in hardware, which
increases this number slowly.
OIF The output interfaces. If entire vlan is displayed, this indicates that static groups apply to
the entire VLAN.
TurboIron#show ip multicast mcache
Example: (S G) cnt=: cnt is number of SW processed packets
OIF: e22 TR(32,33), TR is trunk, e32 primary, e33 output
vlan 10, 1 caches. use 1 VIDX
1 (10.10.10.2 239.0.0.3) cnt=0
OIF: tag e2
age=2s up-time=2s change=2s vidx=8191 (ref-cnt=1)