If using the Synology media serve, then you can decrease ssdp advertisement interval. The default is 180, I currently have mine set at 30 and the server appears reasonably quickly. This setting is found in media server, general settings. This setting is the discovery time.
If using another media server try and find the same setting and decrease
Hmmm, odd. I suppose you didn’t change anything either. kend’s post about the SSD advertisement interval is surely a good thing to check, though if you didn’t change anything then I don’t know why it would suddenly have an effect.
One thing you can try is to unplug the cable from the NDX2 and try connecting it by wifi. If this works, it at least rules out some things / narrows it down
SSDP is a function of Synology’s ‘Media Server’
I’m not sure what the other servers like Asset & Minim use.
Naim Streaming Products the common ones that are used are
“Bonjour”, (used by Apple Wireless AirPlay Configuration, Spotify Connect and the Naim app)
“UPnP” (used for locating UPnP servers)
“Ping” (used by Naim music servers for checking that devices hosting music shares and stores are still online).
When any of these auto-discovery services fail (for whatever reason), its invariably because of poorly implemented networks.