General question about Multicasting.
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I’m having trouble with multicasting and suspect it’s because there are several switches between the Fog server and the host computer, even though they’re all on the same VLAN. After checking the documentation, I’m still unsure which port numbers need to be allowed for multicasting to work correctly. The Web UI indicates that port 63100 is the default for broadcasting, and Udpcast uses port 9000 and port 9001.
I’m not an expert in networking, so I would appreciate it if someone could tell me if I need to ask our networking team to open specific ports on that VLAN for multicasting. Any other advice would also be very helpful. Thank you!
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@mashina Its been a while since I worked with multicast, but for the switches, you may need to enable igmp snooping on each switch for the vlan where you are going to send multicast packets through. The ports are dynamic because each multicast stream use their own ports on the same class D address.
All of the devices meet at a well known (rendezvous) address and then jump to the assigned data channel address.
For multicasting its more of a art than a science. I would start trying to multicast to one system on the same switch as the fog server. Confirm that it works there first. That will ensure that everything is configured correctly on the FOG side (FOG should come preconfigured so it should work out of the box).
If your fog server has more than 1 nic card, you will need to create a static route to tell your FOG server which network interface to use to send multicast data streams.
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@george1421 Thank you for the clarification and your good advice. I will look into it further.
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The problem was the IGMP Snooping as you suspected. Thank you for your help.