Troubleshooting video multicasting on a LAN with 3Com 4200G doing routing and the remainder of the switches on the network are 3Com 4500s. The video system is Safari Montage.
Safari people tell me that igmp-snooping and pim must both be enabled in order to multicast the video, but pim is not a feature of these switches. 3Com documentation indicates that if igmp-snooping is disabled, the video will be broadcast by default, but that does not work either.
The video encoder, video server and all wired LAN clients are on the same VLAN. The encoder puts the H.264 video onto the LAN and can be configured to unicast or multicast. The server provides a web interface to view the video using http. The video feed from the encoder can and has been tested using QuickTime using rtsp, and that testing has proven that multicasting is working; at least, I can view the video from randomly selected PCs on the LAN so my impression is that multicasting is working. Ideally, the users will open the web page to video the multicast, but right now my only option seems to be to use QuickTime.
Am not clear what other information I should provide in order to get help, so please ask any questions. Sincerely appreciate any and all assistance.
BTW, the system used to work. The network was reconfigured; VLANs were added. There is a management VLAN1, VLAN100 (wired LAN clients) and VLAN101 (WLAN clients). I do not have a backup of the switch configs from before the changes.