From: Hobbs (deadheadblues@gmail.com)
Date: Wed Dec 10 2008 - 19:49:28 ARST
Hello friends,
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 thank you
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: Thu Jan 01 2009 - 12:53:08 ARST