So I've been struggling with this for a while and I thought I'd ask for some help. I have RB450G + RouterOS 4.11 with 3 interfaces configured: LAN, WLAN, WAN. I have an external AP on the WLAN and I treat WLAN almost like WAN except for poking some holes through the firewall.

I've got a bunch of media servers on the LAN and a few iPhones on the WLAN. I want the iPhones to have full access to the media servers on the LAN. Many of the iPhone apps require UPnP so I turned that on the WLAN, LAN interfaces as 'internal'.

I had no luck with that so I figured that the multicast UPnP to 239.255.255.250 were being blocked between the WLAN & LAN. So I added PIM interfaces for the LAN and WLAN using pim, igmp v2. All other settings are default. So now some devices are visible but not all of them. Wondering if anyone has some suggestions since this is stretching my knowledge.

Thanks in advance