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112 posts

Master Geek

#303689 28-Feb-2023 15:41
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After some ideas to help fault find.


I have one fritzbox 7590 as wifi, router and dec phone etc (IP is Connected to a separate adsl modem with firewall blocking all external access on ADSL (IP Separate NUC on internal network doing DHCP that allocates IP's, Name servers (an internal IP and second as and Router gateway or Have another fritzbox ( connected to Starlink power supply unit output acting as Wan router. This Appears to work perfectly except below.


This allows me to change any device gateway to 2talk adsl (slow but adequate backup link in case of failures in starlink etc)) or Starlink (very fast) plus with various hardware to have two of every device (or equivalent) in case of failure. 


Do have adsl failures and power failures here in the middle of no-where.


So problem is Starlink keeps having small outages (couple of seconds irregularly over the day and noticed by streaming music stopping or large pauses in internet connections. We both work from home and these are noticeable to the point of being a pain.


If I swap out the fritz 7590 on and replace with old Huawai B315s setup on same IP then problem goes away. Prefer to use fritz but only after can solve problem.


Suspect DNS issue as this setup worked perfectly when originally installed but has become more noticeable in recent times. (creeping small failure problem)


On PC nslookup shows internal name server ip every time when using adsl gateway.


But when using fritz as gateway with Starlink then no matter what i do nslookup shows even when name servers turned off on .56 fritz. It seems to use no matter what settings i change and i suspect that causes the intermittent.


Open to all ideas to dig further.



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210 posts

Master Geek

  #3043398 28-Feb-2023 19:03
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I was using a Fritz 7560 briefly as a WAN router for Starlink (round dish), but the GigE would sometimes drop down to 100M.  I have heard of people needing to put a switch between the SL power adaptor and their 3rd party router to make the Ethernet stable.  Never tried it because the 2.4GHz chip in the Fritzbox died. (Moved to a Mikrotik router and TP-link Mesh.  The Fritz was demoted to DECT use only)  


So as a long shot, maybe try a switch between the Fritz and power supply




You will find anything you want at MightyApe (affiliate link).

112 posts

Master Geek

  #3043455 1-Mar-2023 08:53
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Will try. Good idea to try. Thanks.


112 posts

Master Geek

  #3043698 1-Mar-2023 16:53
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Has been running for a few hours now with a 1G switch between dishy power unit and fritzbox and has not missed a beat. Yeah!


Looks like your suggestion was spot on.



6946 posts

Uber Geek

ID Verified

  #3043750 1-Mar-2023 19:01
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Look out for any 'green' power options on fritz. Drops the LAN down to 100 (dumbest thing ever) too.

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