Configuration Guide User guide

1644 FastIron Configuration Guide
53-1002494-02
MLD snooping configuration
Displaying MLD snooping mcache information
The MLD snooping mcache contains multicast forwarding information for VLANs. To display
information in the multicast forwarding mcache, enter the show ipv6 mld-snooping mcache
command.
Syntax: show ipv6 mld-snooping mcache
The following table describes the output from the ipv6 mld-snooping mcache command.
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 port.
life The number of seconds the group can remain in EXCLUDE mode. An EXCLUDE mode changes
to INCLUDE if it does not receive an IS_EX or TO_EX message during a specified period of time.
The default is 140 seconds. There is no life displayed in INCLUDE mode.
mode The current mode of the interface: INCLUDE or EXCLUDE. If the interface is in INCLUDE mode,
it admits traffic only from the source list. If the 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.
An MLDv1 group is in EXCLUDE mode with a source of 0. The group excludes traffic from 0
(zero) source list, which actually means that all traffic sources are included.
group If you requested a detailed report, the following information is displayed:
The multicast group address
The mode of the group
Sources from which traffic will be admitted (INCLUDE) or denied (EXCLUDE) on the
interface.
The life of each source list.
If you requested a tracking/fast leave report, the clients from which reports were received are
identified.
Field Description
(abcd:ef50 0:100): The lowest 32 bits of source and group. It is displayed in XXXX:XXXX hex format. Here XXXX is
a 16-bit hex number.
cnt The number of packets processed in software. IPv6 packets are switched in software,
causing this number to increase slowly.
OIF Output interfaces. Entire vlan means that static groups apply to the entire VLAN.
age The mcache age. The mcache is reset to 0 if traffic continues to arrive, otherwise it is aged
out when it reaches the time defined by ipv6 mld-snooping mcache-age.
Field Description
Brocade#show ipv6 mld-snooping mcache
Example: (S G) cnt=: (S G) are the lowest 32 bits, cnt: SW proc. count
OIF: 0/1/22 TR(0/1/32,0/1/33), TR is trunk, 0/1/32 primary, 0/1/33 output
vlan 1, has 2 cache
1 (abcd:ef50 0:100), cnt=121
OIF: 0/1/11 0/1/9
age=0s up-time=120m vidx=4130 (ref-cnt=1)
2 (abcd:ef50 0:101), cnt=0
OIF: entire vlan
age=0s up-time=0m vidx=8191 (ref-cnt=1)
vlan 70, has 0 cache