Displaying MLD Snooping Information

You can use various show commands to view information about MLD snooping.
Use one of the following commands to view MLD snooping information. The commands do not need to be entered in the specified order. Using these commands is optional and they can be entered in any order. For more information on the full list of show ipv6 multicast commands, refer to the RUCKUS FastIron Command Reference.
  1. Enter the show ipv6 multicast traffic command to display status information about MLD snooping traffic. 
    device> show ipv6 multicast traffic

MLD snooping: Total Recv: 32208, Xmit: 166
Q: query, Qry: general Q, G-Qry: group Q, GSQry: group-source Q, Mbr: member
Recv    QryV1    QryV2    G-Qry    GSQry    MbrV1    MbrV2     Leave
VL1         0        0        0        0    31744      208       256
VL70        0        0        0        0        0        0         0
Recv     IsIN     IsEX     ToIN     ToEX    ALLOW    BLOCK   Pkt-Err
VL1      1473    31784        0        1        1        7         0
VL70        0        0        0        0        0        0         0
Send    QryV1    QryV2    G-Qry    GSQry    MbrV1    MbrV2
VL1         0        0      166        0        0        0
VL70        0        0        0        0        0        0
  2. Enter the show ipv6 multicast vlan command and specify a VLAN to display MLD snooping information for the specified VLAN. 
    device> show ipv6 multicast vlan 11 

Version=1, Intervals: Query=300, Group Age=620, Max Resp=10, Other Qr=605,
Leave Wait=2, Robustness=2
    router ports: 1/36(120) 2001:DB8::2e0:52ff:fe00:9900,
  My Query address: fe80::ce4e:24ff:fe6f:980 (link-local)
  1/26 has 2 grp, non-QR (passive), cfg V1
  1/26 has 2 grp, non-QR (passive), cfg V1
    group: ff10:1234::5679, life = 100
    group: ff10:1234::5678, life = 100
  1/35 has 0 grp, non-QR (QR=2001:DB8::2e0:52ff:fe00:9900, age=20), dft V2 trunk
  3. Enter the show ipv6 multicast error command to display information about possible MLD snooping errors. 
    device> show ipv6 multicast error

snoop SW processed pkt: 173, up-time 160 sec
  4. To display default, maximum, current, and configured values for system maximum parameters, use the show default values command. The following output example does not show complete output; it shows only MLD group values. 
    device> show default values

System Parameters     Default    Maximum    Current    Configured
MLD-snoop-group-addr  4096       8192       5000       5000
  5. Enter the show ipv6 multicast group command to display information about MLD snooping groups. 
    device> show ipv6 multicast group

p-:physical, ST:static, QR:querier, EX:exclude, IN:include, Y:yes, N:no
VL1 : 263 grp, 263 grp-port, tracking_enabled
      group                                    p-port ST QR life mode source
1     ff0e::ef00:a0e3                          1/1/7  N  Y  120  EX   0
2     ff01::1:f123:f567                        1/1/9  N  Y       IN   1
    In this example, an MLDv1 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.
  6. Enter the show ipv6 multicast group command with the detail keyword, and specify a group address, to display detailed information about an MLD snooping group. 
    device> show ipv6 multicast group ff0e::ef00:a096 detail

Display group ff0e::ef00:a096 in all interfaces in details.
p-:physical, ST:static, QR:querier, EX:exclude, IN:include, Y:yes, N:no
VL1 : 1 grp, 1 grp-port, tracking_enabled
      group                                    p-port ST QR life mode source
1     ff0e::ef00:a096                          1/1/7  N  Y  100  EX   0
    group: ff0e::ef00:a096, EX, permit 0 (source, life):
      life=100, deny 0:
  7. If tracking and fast leave are enabled, you can display the list of clients for a particular group by entering the Enter the show ipv6 multicast group command with the tracking keyword. 
    device> show ipv6 multicast group ff0e::ef00:a096 tracking

Display group ff0e::ef00:a096 in all interfaces with tracking enabled.
p-:physical, ST:static, QR:querier, EX:exclude, IN:include, Y:yes, N:no
VL1 : 1 grp, 1 grp-port, tracking_enabled
      group                                    p-port ST QR life mode source
1     ff0e::ef00:a096                          1/1/7  N  Y  80   EX   0
    receive reports from 1 clients: (age)
      (2001:DB8::1011:1213:1415 60)
  8. The MLD snooping mcache contains multicast forwarding information for VLANs. Enter the show ipv6 multicast mcache command to display information in the multicast forwarding mcache. 
    device# show ipv6 multicast mcache
Example:
    (S G) (MAC ADDR) cnt=: SRC and GRP IPv4/IPv6 address,
    Multicast Mac address, cnt is number of SW processed packets
    OIF: 1/1/22 TR(1/1/32,1/1/33), TR is trunk, 1/1/32 primary, 1/1/33 output
IPv6 Multicast Forwarding Mode: MAC
Total Multicast Cache: 11
vlan 4089, 11 caches. 
1    (* ff1e::5:6)  (3333.0005.0006) cnt=595  
      OIF: tag e1/1/2                         
     age=29s up-time=4497s, change=560s l2mc=258 (ref-cnt=1) 
2    (* ff1e::5:7)  (3333.0005.0007) cnt=1602
     OIF: tag e1/1/2 
     age=23s up-time=4497s, change=562s l2mc=258 (ref-cnt=1)
  9. Enter the show ipv6 multicast resource command to display information about the software resources used. 
    device> show ipv6 multicast resource

                      alloc in-use  avail get-fail    limit  get-mem  size init
mld group               512      9    503        0    32000      272    28  256
mld phy port           1024     16   1008        0   200000      279    21 1024
snoop group hash        512      9    503        0    59392      272    20  256
.... Entries deleted
total pool memory 194432 bytes
has total 1 forwarding hash
Available ipmc: 4061
Parent topic: IPv6 Multicast VLAN Traffic Reduction