A subnet or VLAN = broadcast ___domain. Usually broadcast ___domain = multicast ___domain.
Any standard firewall contains tools for PIM (protocol independent multicast) routing. PIM router as the GW for both subnets / VLANs does the trick fine, and is easy-ish to setup. Using this for mDNS printer discovery on a guest network to an internal printer network.
This article is right in that multicast is stupid to use for this, but wrong in that the purpose of a net admin is to NET ADMIN. Make it work and quit whining, multicast is not a new or difficult problem.
Any standard firewall contains tools for PIM (protocol independent multicast) routing. PIM router as the GW for both subnets / VLANs does the trick fine, and is easy-ish to setup. Using this for mDNS printer discovery on a guest network to an internal printer network.
This article is right in that multicast is stupid to use for this, but wrong in that the purpose of a net admin is to NET ADMIN. Make it work and quit whining, multicast is not a new or difficult problem.