6 good questions and answers: "LAN Multicast Optimizations - IGMP snooping"

What is the command to enable IGMP snooping statically for an uplinkport on a switch to querier router (IPv4/IPv6)?

(config)#ip igmp snooping vlan 123 mrouter interface gi 0/0
(config)#ipv6 mld snooping vlan 123 mrouter interface gi 0/0


CBT 11 - IGMP  Implement and Troubleshoot 12:30

The following example displays the output of the show ip igmp snooping mrouter command.
Router# show ip igmp snooping mrouter

Vlan ports
---- -----
123 gi0/0 static, switch
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What is the command to display the Internet Group Management Protocol (IGMP) snooping configuration of a device?
Router# show ip igmp snooping

groupsFlags: I -- IGMP snooping, S -- Static, P -- PIM snooping, A -- ASM mode Vlan Group/source    Type Version      Port List
-----------------------------------------------------------------------
2       224.1.1.1               I         v2            Te7/4 Te5/2 Gi41/1 Gi41/44 Gi51/1 Gi51/44 Te4/2
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What is the command to enable to configure a switchport gi0/0 statically to recieve a multicast stream for vlan123 multicast stream 224.1.2.3/ff05::1234?
(config)#ip igmp snooping vlan 123 static 224.1.2.3 interface gi0/0
(config)#ip mld snooping vlan 123 static ff05::1234 interface gi0/0

CBT 11 - IGMP  Implement and Troubleshoot  15:00
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What is the command to configure and verify the source address for IGMP queries on a switch?
(config)#ip igmp snooping querier address 10.10.10.1

Router# show ip igmp snooping querier vlan 2

IP address : 10.10.10.1
IGMP version : v2
Port : Te4/4
Max response time : 10s


CBT 11 - IGMP Implement and Troubleshoot 17:00

Configures a snooping querier when you do not enable PIM because multicast traffic does not need to be routed. The IP address is used as the source in messages. The default is disabled.

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/IGMPSnooping.html
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What is the command to troubleshoot IGMP snooping on a vlan?
switch# show ip igmp snooping vlan 1
Global IGMP Snooping configuration:
-------------------------------------------
IGMP snooping : Enabled
IGMPv3 snooping (minimal) : Enabled
Report suppression : Enabled
TCN solicit query : Disabled
TCN flood query count : 2
Robustness variable : 2
Last member query count : 2
Last member query interval : 1000

Vlan 1: --------
IGMP snooping : Enabled
IGMPv2 immediate leave : Disabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode : IGMP_ONLY
Robustness variable : 2
Last member query count : 2
Last member query interval : 1000
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What is the command to check IGMP groups?

R1# show ip igmp groups
IGMP Connected Group Membership
Group Address    Interface      Uptime          Expires         Last Reporter
239.255.0.1      Ethernet1      00:10:54        00:01:10        192.168.9.1
224.0.1.40       Ethernet0      01:36:27        00:02:45        192.168.10.2
224.0.1.40       Ethernet1      01:48:15        never           192
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