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 <s...@svenschwermer.de>
To: "ModemManager (development)" <modemmanager-devel@lists.freedesktop.org>
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
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