From: dave@davehigton.me.uk   
      
   In message <10j3tdq$29dt0$1@dont-email.me>   
             Pancho  wrote:   
      
   > On 12/30/25 20:00, David Higton wrote:   
   > > In message <10iv40e$1e1ba$1@dont-email.me>   
   > >            Pancho  wrote:   
   > >   
   > > > IPv6 seems like a world of pain.   
   > >   
   > > In my experience it just works.   
   > >   
   >   
   > I'm surprised. Accepting that you do not do some of the things I do,   
   > like policy routing rules based upon a host computer IP, I'm still   
   > seeing servers on the internet that advertise they should work with IPv6   
   > but don't. This means they don't fall back to IPv4.   
   >   
   > I'm not far enough along in my understanding to be entirely confident,   
   > but I would be surprised if I were wrong.   
      
   I've not encountered anything that's more difficult in IPv6 than in IPv4.   
   I'm certain that IPv6 works just as well and as reliably as IPv4; after   
   all, it's been in global-scale use for many years now, so all the issues   
   have been solved.  But there's always scope for something to go wrong,   
   like in the example I quoted earlier where there was an IPv6 interface   
   that didn't previously exist, and configuring it (which was no more   
   difficult than the original IPv4 config, which was done so long ago that   
   everyone had forgotten it) simply hadn't been done.  Since everything   
   mainstream now defaults to IPv6, there were two fault symptoms, depending   
   which browser and OS were in use:   
      
   1) The site appeared unavailable;   
      
   2) The site was reached, but only after a delay.   
      
   Nothing about it was a problem of IPv6 per se.   
      
   I'd be interested to know what "policy routing rules based upon a host   
   computer IP" you're using.  My router runs OpenWRT.  Everything gets   
   its IPv6 address via DHCPv6.  The traffic rules pick up the device by   
   name, so, if the IPv6 address changes, the rules change automatically   
   to match.   
      
   David   
      
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