Introduction to IP Multicasting - LAN Multicast Optimizations - IGMP snooping
6 important questions on Introduction to IP Multicasting - 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
What is the command to display the Internet Group Management Protocol (IGMP) snooping configuration of a device?
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
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 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?
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
What is the command to troubleshoot IGMP snooping on a vlan?
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
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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