Hi Giuseppe

Many tanks for your fast reply. Can you tell too that how I can to monitore the process?

I appreciat!

sfanayei

Hello Shanryar,

on the router L3 switch use

sh ip igmp groups

look at the time the group is joined

sh ip mroute multicast-group-address

check that the oilist contains Vlan A and/or Vlan B

on the L2 switch

check if IGMP is enabled with:

sh ip igmp snooping

you can see the multicast addresses in

sh mac-address-table int type x/y

there is a second section after unicast MAC addresses

Hope to help

Giuseppe

Tanks again. It was very useful.

sfanayei

Hi,

Giuseppe helped me out earlier with that post he recommended, so I'll give him a break and try to answer your question.

You should be able to check that IGMP snooping is active on the switch by typing "sh ip igmp snooping"

This gives you the IGMP snooping global settings as well as individual settings per vlan.

An easy way to check if broadcasts are only forwarded to the ports you want is to use a network sniffer (such as wireshark) on 2 or more systems in the same VLAN.

Start by monitoring both systems without the multicast requestor application running.

Then, on one system, start the application (and hence the multicast requests) - You should see multicast broadcasts only to that system and not the other.

I hope that helps.

Hi,

Tanks a lot. I will test it like you said.

sfanayei