Can't get igmp max-groups to limit number of groups

Unanswered Question
Dec 10th, 2008
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I have configured ip igmp max-groups but it not limiting the number of groups R1 joins. SW1 is a 3560.


R1----->f0/1[SW1]f0/3<-----R3


R1:


interface Ethernet0/0

ip address 192.168.135.1 255.255.255.0

ip igmp join-group 239.0.0.1

ip igmp join-group 239.0.0.2

ip igmp join-group 239.0.0.3

ip igmp join-group 239.0.0.4

ip igmp join-group 239.0.0.5


SW1:


interface FastEthernet0/1

description to R1

switchport access vlan 135

switchport mode access

ip igmp max-groups 2


But R3 still shows all the groups with last reporter as 192.168.135.1:


R3#clear ip igmp group e0/0

R3#show ip igmp groups

IGMP Connected Group Membership

Group Address Interface Uptime Expires Last Reporter

239.0.0.1 Ethernet0/0 00:00:02 00:02:57 192.168.135.1

239.0.0.2 Ethernet0/0 00:00:04 00:02:55 192.168.135.1

239.0.0.3 Ethernet0/0 00:00:01 00:02:58 192.168.135.1

239.0.0.4 Ethernet0/0 00:00:03 00:02:56 192.168.135.1

239.0.0.5 Ethernet0/0 00:00:03 00:02:56 192.168.135.1

224.0.1.40 Ethernet0/1 00:00:03 00:02:56 192.168.23.2

224.0.1.40 Ethernet0/0 01:41:30 00:02:56 192.168.135.3


SW1 is forwarding these groups still:


SW1#show ip igmp snooping groups

Vlan Group Type Version Port List

----------------------------------------------------------------

135 224.0.1.40 igmp v2 Fa0/3

135 239.0.0.1 igmp v2 Fa0/1, Fa0/3

135 239.0.0.2 igmp v2 Fa0/1, Fa0/3

135 239.0.0.3 igmp v2 Fa0/1, Fa0/3

135 239.0.0.4 igmp v2 Fa0/1, Fa0/3

135 239.0.0.5 igmp v2 Fa0/1, Fa0/3


I also tried using it on the port connected to R3 but no luck.

Anyone know how is this command supposed to work?


Here is the DocCD reference:


http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_44_se/command/reference/cli1.html#wp2238313



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