Unanswered Question
Aug 17th, 2010

hello all,

that's my problem,


i have a LAN, witch 4507, and 18 cisco 2960, all running in basic ios image((cat4500e-IPBASE-M), Version 12.2(50)SG3) ((C2960-LANBASEK9-M), Version 12.2(44)SE6 ), all acces switch are connected with the Giga 0/1 port to the core switch with Fiber.

i have 18 Vlans, the Vlan 4 is fir the IP camera, and encodeur, the Vlan 6 is for the camera client, our encodeur use multicast to diffude a video to the clients in VLAN 6, and i have a probleme when the encoder when i watch more 6 camera at the same time ( 1 camera use 4 Mb/s ),

i need the configuration to put in the core and acces Switch, to reduce a multicast in my network,

i pute this configuration but its dosnt work:

in the acces switch :

ip igmp snooping vlan 4 mrouter interface Gi0/1
ip igmp snooping vlan 6 mrouter interface Gi0/1

in the core switch :

ip multicast-routing

interface Vlan4
ip address
ip pim sparse-dense-mode
ip igmp version 3

interface Vlan6
ip address
ip pim sparse-dense-mode
ip igmp version 3

thank u( sorry for my english )

I have this problem too.
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Giuseppe Larosa Wed, 08/18/2010 - 03:37

Hello Hamou,

see if  the following command

ip igmp limit is  supported on interfaces of your switches

ip igmp limit N



this could be of help in limiting

or more appropriate

ip igmp max-groups


Hope to help


ramdane.airdahmane Wed, 08/18/2010 - 04:06

thank for your help,

if someone can explain  this ip in this show commande : ( because it is not a multicast IP for my ip tv )

OSS1SWC01BT#show ip ig groups
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
oup Accounted  Vlan6                    09:53:11  00:02:22  Vlan4                    09:53:13  00:02:23       Vlan4                    09:55:00  00:02:27


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