MinimWatch can't find MinimServer on Synology NAS

[hsimon46]

(10-04-2017 08:50)simoncn Wrote:  It sounds like your router supports multicast discovery over wired networks but not over wireless networks. You could try experimenting with 2.4 GHz and 5 GHz wireless (using a different SSID for each of these) to see if either of these is better than the other. If not, the only solution is to use a different router.

Not sure I fully understand. I currently use a home network that is separate from the 2.4 and 5.0 networks I can see (emanating from the AT&T modem?) in my list of available networks. Would I need to switch everything in the house to one of those networks? (Not sure how I do that with the Airport Extreme, but I suppose I can figure that out . . .)

If I do need to use a router other than the AirPort Extreme, do you have a suggestion for what I should use that would solve this problem? Would another router support the AirPort Expresses that I use around the house to boost signal? Sorry (again) for my lack of knowledge here -- I appreciate the help!)