After the latest firmware update and the latest but one Naim App update, the connectivity between my ND5 XS and the Naim App was much improved - it basically ran without problems until I updated to the latest Naim App (4.7).
With the latest version of the Naim App, I cannot connect to the ND5 XS for more than 50% of the time. Right now, I'm using the "PlugPlayer" App to communicate with the ND5 XS as the Naim App cannot.
The ND5 XS is connected by Wifi as the layout of the apartment/building management precludes making a wired connection.
Two things make me believe that there is a problem with the ND5 XS and/or Naim App:
1. The PlugPlayer App works when the Naim App does not.
2. The ND5 XS does not respond to a network ping request most of the time (it is configured with a static IP address).
Any ideas on how to fix this?
Posted on: 07 November 2015 by juanito
For what it's worth, I noticed that after the ND5 XS had been switched off for a few hours, the network scanner showed "BP" against it when switched on again.
After an hour or two this dropped to "P" and then the ND5 XS disappeared.
The other four or five devices on the LAN showing bonjour services do not disappear.
Posted on: 07 November 2015 by Burgy100
Right on mine I have B U P, B=bonjour U=upnp and P is the web interface, so your bonjour services are stopping. As I have mine wired in to the network I cannot replicate it the moment. Can any services on the unit go to sleep ? or where you are streaming from?
Posted on: 09 November 2015 by PeterJ
I had a lot of problems with the Nain App losing connection with the devices (a Superunity and a Muso). It would take several minutes to establish a connection (the app showed 'no rooms found' or would not connect to a device). The App would also lose connection if I moved around with my phone.
I have recently replaced my Modem/Router. I had a 3 year old Netgear router which was beginning to giver me no end of problems. I replaced it with a business class Draytek 2860n. Since then the App connects immediately and doesn't lose its connection.
Posted on: 09 November 2015 by Simon-in-Suffolk
Hmm reading through this thread, and the fact the OP is using a Cisco router.. A few things spring to mind.. It's not a case of Bonjour services stopping, it's more a case of the discovery propagation for Bonjour being blocked by the router possibly.
Naim have upgraded to IGMP v2 and I think v3 ... So it might be worth seeing if you have got IGMP snooping enabled on the router and if so tell it to support v2 and or v3 IGMP or better initially just simply disable IGMP snooping.
I don't know the capability of the router, but this really sounds like a snooping error on the router or a imcompatability.. So best turn it off if you can.. IGMP was modified in the more recent firmware to work better with many modern routers supporting multicast for IPTV etc.
Failing that I have had real issues in the past with a Cisco 870 and wifi multicast (Bonjour discovery) and so I used to work around with a seperate Apple airport express for wifi plugged into the router switch port or a seperate downstream switch.
Simon
Posted on: 25 November 2015 by juanito
Thanks for the suggestion, but the only IGMP setting on the router is to allow/disallow multicast pass through from the Internet, which is disabled.
Posted on: 25 November 2015 by Simon-in-Suffolk
ok without network logs its hard to envisage what your router is doing with its switch ports and the internal multicast groups.
As an experiment Id be inclined to use a cheap little switch to connect everything to, and perhaps borrow a little Apple Airport Express wifi point to plug into the switch as well.
Cheap basic switches like the little Netgear unmanaged switches don't have the brains to manage multicast - they simply broadcast it blindly to all ports. For a home network this has the advantage that you don't need to worry about multicast groups and correctly functioning routers and clients. Anything with a class D multicast address gets broadcast out across the home LAN - This way you are removing the network from any discovery issues at the expense of efficiency.
Simon
Posted on: 26 November 2015 by juanito
Hmm - I am using a Cisco gigabit switch, but what puzzles me is why things work for a few hours and then stop.
If the router was blocking IGMP, then things wouldn't work at all, no?
Posted on: 26 November 2015 by Bart
K.I.S.S. seems to be the best strategy these days. A simple unmanaged switch that everything is plugged into . . . my home music has been totally reliable for years now it seems. All I ever need to do is reboot my NDS once every 6 months or so when for some reason it just stops seeing the network. And this is after installing each of the Naim beta updates and commercial releases on the NDS and the Qute.
I've had music network frustrations in the past, and I sympathize. I've heard my wife say, "You spent how much on this and it doesn't work?" But that was well in the past 
