Fri May 23, 2025 1:00 am by atc98092
Basically a VLAN is a completely independent network from another VLAN. The only way for traffic to pass between them is via routing rules. UPnP uses port 1900 UDP, and Multicast is another function that must pass between the two VLANs. While I do have some networking experience, I've never bothered with VLANs on my home network as everything I have on the network is fine talking with each other. However you have your VLANs configured, there should be some place for routing rules to be applied, and that is where you need to begin looking.
Dan
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