I recently bought a Lutron SmartBridge 2 kit with dimmers and it works great. However, I've been trying to make my Harmony Hub recognize it as per the troubleshooting instructions in your website and theirs, and it just never recognizes it. With my Harmony hub, I am able to recognize other devices in my network, and airplay works, so this is not a multicast issue. I have multicast configured accordingly in all the routers that I used for testing.
I also tried with 4 different routers (Dlink DIR 860l, DIR 850, Linksys E2000 and TP Link WRT841N). I made sure that all of them had multicast enabled, but it still don't recognize it even though every other multicast dependent service works. That is why I am pretty sure it's an issue with the Lutron SmartBridge fw. I am a Software Engineer so I have some knowledge on networking, debugging stuff, etc.
I have attached in l a Wireshark capture that should help figure this out.
harmony hub: 192.168.0.146
lutron smartbridge: 192.168.0.129
Any ideas on what could be wrong?