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Re: IPv4 specific issue with USB tethering between my Debian laptop and my phone

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Dan Ritter wrote:
> ip link set USBNET0 mtu 1450, or something like that. I don't
> know NetworkManager's syntax for that; random googling suggests
> that they at least had a historical problem with not being able
> to set MTU on anything other than a pure ethernet or wifi link,
> but perhaps they've solved that?

"ip link" works on its side. I can see with wireshark that something
like "ip link set usb0 mtu 1300" is honored, but this doesn't solve
the problem (I've tried various values from 1000 to 1450).

Note that I could also see with wireshark that the iptables rules
with --clamp-mss-to-pmtu did not change the packet lengths.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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Thread

IPv4 specific issue with USB tethering between my Debian laptop and  my phone Vincent Lefevre <vincent@vinc17.net> - 2021-12-15 01:20 +0100
  Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Dan Ritter <dsr@randomstring.org> - 2021-12-15 01:40 +0100
    Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Tim Woodall <debianuser@woodall.me.uk> - 2021-12-15 07:10 +0100
      Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Vincent Lefevre <vincent@vinc17.net> - 2021-12-15 18:00 +0100
        Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Tim Woodall <debianuser@woodall.me.uk> - 2021-12-15 18:10 +0100
          Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Vincent Lefevre <vincent@vinc17.net> - 2021-12-16 23:50 +0100
        Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Dan Ritter <dsr@randomstring.org> - 2021-12-15 19:40 +0100
          Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Vincent Lefevre <vincent@vinc17.net> - 2021-12-17 01:10 +0100
            Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Tim Woodall <debianuser@woodall.me.uk> - 2021-12-17 08:20 +0100
              Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Vincent Lefevre <vincent@vinc17.net> - 2021-12-19 00:00 +0100
                Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone didier gaumet <didier.gaumet@gmail.com> - 2021-12-19 09:10 +0100
                Re: IPv4 specific issue with USB tethering between my Debian laptop  and my phone Tim Woodall <debianuser@woodall.me.uk> - 2021-12-19 10:20 +0100

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