Example 4b: Cisco Catalyst 3750 (12.2(25)SE) snooping IGMP v2 with two receivers

In this example, the Cisco also does the right thing with the only wierdness that already noted in example 2e.

The traces

Raw tcpdump traces are here:

host 10
host 11
host 12
host 13
switch console log
router console log

Host 10 joins group.
host 10
No.     Time        Source                Destination           Protocol Info
      5 190.169199  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 5 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 13
No.     Time        Source                Destination           Protocol Info
      5 190.145404  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 5 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 11 nothing
host 12 nothing
Data starts to flow. Host 13 sees it come down from router which passes through to host 10 only, as it should.
host 13
No.     Time        Source                Destination           Protocol Info
      6 190.814467  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 6 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)
host 10
No.     Time        Source                Destination           Protocol Info
      6 190.839826  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 6 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)
host 11 nothing
host 12 nothing
switch
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/3
router
wat-edge-1#sho ip igmp groups fa7/37              
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:00:38  00:02:32  128.59.7.10
Data keeps flowing, host 10 sends membership reports, one of which is suppressed by the switch.
host 10
No.     Time        Source                Destination           Protocol Info
     14 197.989980  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 14 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
     18 200.844523  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 18 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 13
No.     Time        Source                Destination           Protocol Info
     17 200.818708  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 17 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 11 & 12 nothing
The router sends periodic general membership queries which host 10 responds to.
host 13
No.     Time        Source                Destination           Protocol Info
     58 241.755386  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 58 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)

No.     Time        Source                Destination           Protocol Info
     66 248.009363  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 66 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 10
No.     Time        Source                Destination           Protocol Info
     59 241.787417  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 59 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)

No.     Time        Source                Destination           Protocol Info
     67 248.041426  128.59.7.10           224.5.6.7             IGMP     V2 Membership Report

Frame 67 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 11 & 12
No.     Time        Source                Destination           Protocol Info
      5 241.788942  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 5 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)
Host 11 joins group, sending three membership reports spaced a few seconds apart. The first one is passed through by the switch and traffic immediately starts flowing. The second is suppressed by the swtich while the third gets through.
host 11
No.     Time        Source                Destination           Protocol Info
      8 393.062218  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 8 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
      9 393.841985  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 9 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)

No.     Time        Source                Destination           Protocol Info
     17 401.434904  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 17 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
     23 405.935209  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 23 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 13
No.     Time        Source                Destination           Protocol Info
    216 393.008629  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 216 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    230 405.879710  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 230 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 10 continues receiving traffic
host 12 nothing
switch
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/3, Fa1/0/4
router
wat-edge-1#sho ip igmp groups fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:03:24  00:02:58  128.59.7.11
Host 10 leaves. This leave is suppressed by the switch and not sent up to the router. The switch spoofs a group-specific membership query with a 5 second max time (note the use of the switch's MAC addresses). After 5 seconds the last UDP data packet is delivered to host 10. Host 11 keeps receiving. The router still thinks host 10 is receiving since it hasn't heard a new host report yet (host 10 is the last reporter).
host 10
No.     Time        Source                Destination           Protocol Info
    414 583.890091  128.59.7.10           224.0.0.2             IGMP     V2 Leave Group

Frame 414 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:00:86:51:bd:b2, Dst: 01:00:5e:00:00:02
Internet Protocol, Src Addr: 128.59.7.10 (128.59.7.10), Dst Addr: 224.0.0.2 (224.0.0.2)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Leave Group (0x17)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x02f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    415 583.890469  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 415 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:0f:8f:c7:27:85, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 5.0 sec (0x32)
    Header checksum: 0x08c1 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    420 588.839825  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 420 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)
host 13 No IGMP messages. Data keeps flowing down.
host 11 No IGMP messages. Data keeps flowing down.
host 12 nothing
switch
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/4
router
wat-edge-1#sho ip igmp groups fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:06:41  00:02:12  128.59.7.10
A little time goes by and the router sends the usual once-a-minute general membership query. Host 11 responds to this, the switch passes it up to the router, and now the router shows host 11 as the last reporter.
host 13
No.     Time        Source                Destination           Protocol Info
    435 604.693754  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 435 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)

No.     Time        Source                Destination           Protocol Info
    437 605.367026  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 437 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 11
No.     Time        Source                Destination           Protocol Info
    228 604.777345  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 228 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)

No.     Time        Source                Destination           Protocol Info
    230 605.449942  128.59.7.11           224.5.6.7             IGMP     V2 Membership Report

Frame 230 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Report (0x16)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x03f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 10
No.     Time        Source                Destination           Protocol Info
    421 604.774223  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 421 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)
host 12
No.     Time        Source                Destination           Protocol Info
     11 604.806498  128.59.7.1            224.0.0.1             IGMP     V2 Membership Query

Frame 11 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:00:00:01
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.0.0.1 (224.0.0.1)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 10.0 sec (0x64)
    Header checksum: 0xee9b (correct)
    Multicast Address: 0.0.0.0 (0.0.0.0)
switch
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/4
router
wat-edge-1#sho ip igmp groups fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:06:56  00:02:58  128.59.7.11
Host 11 leaves. It sends a Leave Group, which the switch holds for 5 seconds before passing up to the router. The switch then spoofs a group-specific query with a 5 second max reponse time. After no hosts reply to this, it sends host 11's Leave Group up to the router. The router then generates two group-specific queries with a 1 second max response time which are flooded to all ports (not just interested ports). These follow the cessation of traffic.
host 11
No.     Time        Source                Destination           Protocol Info
    308 680.142227  128.59.7.11           224.0.0.2             IGMP     V2 Leave Group

Frame 308 (46 bytes on wire, 46 bytes captured)
Ethernet II, Src: 00:50:04:8d:24:62, Dst: 01:00:5e:00:00:02
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.0.0.2 (224.0.0.2)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Leave Group (0x17)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x02f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    309 680.142703  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 309 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:0f:8f:c7:27:86, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 5.0 sec (0x32)
    Header checksum: 0x08c1 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    314 684.843292  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 314 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)

No.     Time        Source                Destination           Protocol Info
    315 685.147311  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 315 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    316 686.700838  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 316 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 13
No.     Time        Source                Destination           Protocol Info
    520 685.052211  128.59.7.11           224.0.0.2             IGMP     V2 Leave Group

Frame 520 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:0f:8f:c7:27:83, Dst: 01:00:5e:00:00:02
Internet Protocol, Src Addr: 128.59.7.11 (128.59.7.11), Dst Addr: 224.0.0.2 (224.0.0.2)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Leave Group (0x17)
    Max Response Time: 0.0 sec (0x00)
    Header checksum: 0x02f3 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    521 685.052681  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 521 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    523 686.606025  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 523 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    524 686.748337  128.59.39.150         224.5.6.7             UDP      Source port: 33853  Destination port: 8910

Frame 524 (1512 bytes on wire, 1500 bytes captured)
Ethernet II, Src: 00:08:7c:d0:08:40, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.39.150 (128.59.39.150), Dst Addr: 224.5.6.7 (224.5.6.7)
User Datagram Protocol, Src Port: 33853 (33853), Dst Port: 8910 (8910)
Data (1458 bytes)
host 10
No.     Time        Source                Destination           Protocol Info
    423 685.143907  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 423 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
    424 686.697452  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 424 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
host 12
No.     Time        Source                Destination           Protocol Info
     13 685.180694  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 13 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)

No.     Time        Source                Destination           Protocol Info
     14 686.734314  128.59.7.1            224.5.6.7             IGMP     V2 Membership Query

Frame 14 (60 bytes on wire, 60 bytes captured)
Ethernet II, Src: 00:d0:03:66:80:0a, Dst: 01:00:5e:05:06:07
Internet Protocol, Src Addr: 128.59.7.1 (128.59.7.1), Dst Addr: 224.5.6.7 (224.5.6.7)
Internet Group Management Protocol
    IGMP Version: 2
    Type: Membership Query (0x11)
    Max Response Time: 1.0 sec (0x0a)
    Header checksum: 0x08e9 (correct)
    Multicast Address: 224.5.6.7 (224.5.6.7)
switch
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/4
Switch>show ip igmp snooping groups vlan 950 224.5.6.7
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
router
wat-edge-1#sho ip igmp groups fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:08:17  now       128.59.7.11
wat-edge-1#sho ip igmp groups fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter