Re: Bearer MTU not recognised by NetworkManager
Just a follow-up: A fix has been merged to NetworkManager upstream: https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/499 <https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/499> > On 7 May 2020, at 16:14, Enrico Mioso wrote: > > Hi!! > > The relevant code is in NetworkManager/src/devices/wwan . In my impression NM > doesn't ask MM for the MTU, using it's own (default) values for that. > Note that it's only my impression from a superficial look. > > Hence, assuming I am right, I guess this isn't a MM related issue. > > Enrico > > > On Thu, 7 May 2020, Sven Schwermer wrote: > >> Date: Thu, 7 May 2020 15:43:51 >> From: Sven Schwermer >> To: "ModemManager (development)" >> Subject: Bearer MTU not recognised by NetworkManager >> Hi, >> >> I’m observing that NetworkManager (v1.20.2) does not recognise the MTU >> (=1360) exposed by the ModemManager’s (v1.10.6) bearer object and instead >> uses some default value (=1500). This seems to lead to issues which are >> fixed when manually setting the MTU to a lower value. When checking the >> NetworkManager’s connection settings, gsm.mtu is set to “auto". I’m >> observing this on a Quectel BG96 hooked up via QMI. My kernel version is >> 4.19.87. >> >> Is this a known issue? Is anyone aware whether this is fixed upstream? >> >> Thanks, >> Sven >> ___ >> ModemManager-devel mailing list >> ModemManager-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel ___ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
Bearer MTU not recognised by NetworkManager
> Hi, > > I’m observing that NetworkManager (v1.20.2) does not recognise the MTU > (=1360) exposed by the ModemManager’s (v1.10.6) bearer object and instead > uses some > default value (=1500). This seems to lead to issues which are fixed when > manually setting the MTU to a lower value. When checking the NetworkManager’s > connection settings, gsm.mtu is set to “auto". I’m observing this on a > Quectel BG96 hooked up via QMI. My kernel version is 4.19.87. > >Is this a known issue? Is anyone aware whether this is fixed upstream? > > Thanks, > Sven See here for an analysis I did for OpenWRT's Netifd and the MTU from the bearer. It's not the same as your situation, so please don't think I'm trying to provide a fix, it's simply a related issue, that's all. https://github.com/openwrt/packages/issues/11383 ___ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
Bearer MTU not recognised by NetworkManager
Hi, I’m observing that NetworkManager (v1.20.2) does not recognise the MTU (=1360) exposed by the ModemManager’s (v1.10.6) bearer object and instead uses some default value (=1500). This seems to lead to issues which are fixed when manually setting the MTU to a lower value. When checking the NetworkManager’s connection settings, gsm.mtu is set to “auto". I’m observing this on a Quectel BG96 hooked up via QMI. My kernel version is 4.19.87. Is this a known issue? Is anyone aware whether this is fixed upstream? Thanks, Sven ___ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
Re: Bearer MTU not recognised by NetworkManager
Hi!! The relevant code is in NetworkManager/src/devices/wwan . In my impression NM doesn't ask MM for the MTU, using it's own (default) values for that. Note that it's only my impression from a superficial look. Hence, assuming I am right, I guess this isn't a MM related issue. Enrico On Thu, 7 May 2020, Sven Schwermer wrote: Date: Thu, 7 May 2020 15:43:51 From: Sven Schwermer To: "ModemManager (development)" Subject: Bearer MTU not recognised by NetworkManager Hi, I’m observing that NetworkManager (v1.20.2) does not recognise the MTU (=1360) exposed by the ModemManager’s (v1.10.6) bearer object and instead uses some default value (=1500). This seems to lead to issues which are fixed when manually setting the MTU to a lower value. When checking the NetworkManager’s connection settings, gsm.mtu is set to “auto". I’m observing this on a Quectel BG96 hooked up via QMI. My kernel version is 4.19.87. Is this a known issue? Is anyone aware whether this is fixed upstream? Thanks, Sven ___ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel___ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
