Minimserver slow to appear as a music source

[simoncn]

I tried this on my Synology DS713+ running DSM 7.1. From the time of the the "system ready" beep, Asset was visible immediately and MinimServer was visible after 7 seconds.

This was with a small test library. The delay would be a bit longer with a large library because Miniserver does a library scan before advertising itself to control points. To reduce this startup time, you can set the startupScan property to false.

A delay of about 30 minutes suggests that there is some configuration issue with your network or your NAS that is blocking UPnP "alive" notifications sent by MinimServer. In the UPnP protocol, the server sends "alive" messages at least once every 30 minutes and the control point (music app) sends M-SEARCH messages at least once every 30 minutes. If the "alive" messages are blocked for some reason, the control point won't discover MinimServer until the control point next sends an M-SEARCH message.

Asset sends "alive" messages much more frequently than the UPnP protocol requires (once every 60 seconds). If for some reason your network is blocking the initial "alive" messages sent by both Asset and MinimServer, Asset would make another attempt after one minute but MinimServer would not do this until almost 30 minutes later. This interval is determined by the ohNet network stack that MinimServer uses for UPnP communications. The ohNet stack doesn't provide any way to change this interval because the ohNet developers don't think "flooding" the network in this way is a good idea.

Are you running the Synology firewall? If so, please try disabling this as a test to see if it makes any difference. Also, does your router do IGMP snooping? If so, this might be blocking "alive" notifications from MinimServer. What router make and model do you have? Does the router configuration allow IGMP snooping to be disabled?