Use of IPv6 by Roon core

Support
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Thanks @Eric. I’ll send over the logs and screenshots shortly.

SETUP

  • Server: Intel NUC6I5SYH running Ubuntu 16.04.2 LTS, running Roon 1.3 (build 223) stable 64bit
  • Admin from iPad Air 2, running Roon 1.3 (build 223) stable 64bit
  • Switch is Cisco SG110D-08 (replaced initial older plastic Cisco, which ran warm)
  • Music stored on Synology 415+ (required changing initial SMB config essentially to defaults)
  • Router is Synology RT2600ac, no IPv6, no traffic shaping. Replaced Time Capsule.
  • Control points: iPhone 6, iPad Air 2, MacBook, MacBookPro, Surface 3 Pro

Two Raspberry Pi 3 / HiFiBerry Digi Pro running DietPi v149 (Linux 4.4.50-v7+), one wired and one wireless, as end point, using 2.4 amp power. Output using S/PDIF (copper) to BelCanto DAC 2.7 and Bel Canto C5i respectively.

Sonos

  • Multiple Sonos devices, including Connect attched to same BelCanto C5i in Kitchen

IPs

  • 10.0.1.230 (core)
  • 10.0.1.2 and .3 (NAS)
  • 10.0.1.233 (wired endpoint)
  • 10.0.1.235 (wireless endpoint)
  • 10.0.1.1 (router)

Network topology
Core, NAS > Cisco switch > Synology router < Cisco switch < wired endpoint

For Kitchen location (wireless), I have tried:

  • Changing the CPU to performance rather than ondemand (and back)
  • Replaced hardware completely (new Pi, new HiFiBerry, new build)
  • Changed to external wireless adapter last night (and disabled internal)
  • Previously have tried altering the buffer size in Roon, but currently using defaults
  • Reported wireless connection 72Mbps “Good” for external adapter, 58Mbps for internal.
  • NB: replaced wireless router as well, as above.

Historic issues

  • Initial SMB config caused Roon to break. [Solved]
  • Original switch would overheat, causing no access to any devices [Solved via replacment]
  • Troubles with large albums either crashing or not displaying. [Solved via software update]

Issue

  • Every so often, the kitchen wireless endpoint drops out, occasionally triggered by launch of control device. Usually the endpoint will reappear in the Roon interface, allowing music to be started (manually) again.
  • Sometimes, music plays for hours.
  • No apparent other network issues, although ICMP demonstrates some volatility in response times.
  • Roon occasionally reports that the audio file is slow to load.

Current state of kitchen

  • Using external USB adapter.
  • Using replacement hardware
  • Roon default config for end point.
  • “ondemand” performance in DietPi.

Things to be done

  • Replace all ethernet cables.
  • Adjust endpoint buffer (require guidance on this)
  • Test UDP performance (?)
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