From: tnp@invalid.invalid   
      
   If you remember I had constricted a bridge from wifi to ethernet to act   
   as a bridged access point. On a PI 4B as a test platform   
      
   The problem was that whilst the bridge was reasonably OK accessing my   
   LAN, up to 90% packet loss was experienced when accessing the internet   
   via my edge router.   
      
   Two further points have been established but the exact reason for the   
   behaviour still remains a mystery   
      
   1/. A friend with a Pi 5 attempted to duplicate the setup, could not get   
   it to work and instead used the Network Manager  GUI to set up  a   
   (routed?) access point which worked ok. It turns out that you cannot use   
   the GUI tool to set up a bridge at all. Only nmcli.   
      
   2/. After a long time with traceroutes and pings I realised that this   
   particular machine was the *only one wired directly to the router via a   
   single gigabit Ethernet cable*. Everything else went via an ancient   
   100Mbps switch that I inherited from an office clearout. In a rash of   
   'well I tried everything else' I unplugged the Pi from the Gigabit   
   router socket  and put it into the 100Mbps switch and bingo!... Pretty   
   decent internet performance. Yes extremely long transfers sometimes   
   fail, but its very useable   
      
   What I cannot for the life of me understand is *why*  this worked. The   
   same [Gigabit] link was involved in both local and Internet access.  The   
   only difference being that local access ALSO went through a 100Mbps switch.   
      
   If anyone can shed light on this I would appreciate it.   
      
   If it matters, the router is a Draytek Vigor2762Vac running PPPoE via an   
   Openrach ONT to an optical fibre for Internet and thence to the ISP.   
      
   --   
   Socialism is the philosophy of failure, the creed of ignorance and the   
   gospel of envy.   
      
   Its inherent virtue is the equal sharing of misery.   
      
   Winston Churchill   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)