Can network manager change MTU?
I've been trying to experiment with jumbo frames. On my ThinkPad, with MTU set to Automatic, the MTU does not follow what the DHCP server provides. I have even tried manually setting the value, but that doesn't work either, even when set to something smaller, such as 1492. Is this an issue with the Network Manager? Or perhaps a hardware limitation? I can change MTU in Yast Network Setting on my desktop system. I'm running openSUSE 15.4 & KDE. tnx jk
Hi, Yes it can, but only in cli with nmcli nmcli c con-name.mtu 12345 Cheers, Damian Oct 27, 2023 22:50:35 James Knott <james.knott@jknott.net>:
I've been trying to experiment with jumbo frames. On my ThinkPad, with MTU set to Automatic, the MTU does not follow what the DHCP server provides. I have even tried manually setting the value, but that doesn't work either, even when set to something smaller, such as 1492. Is this an issue with the Network Manager? Or perhaps a hardware limitation?
I can change MTU in Yast Network Setting on my desktop system.
I'm running openSUSE 15.4 & KDE.
tnx jk
According to this link, you must unset MTU from NM in order to get it from dhclient. https://bugzilla.gnome.org/show_bug.cgi?id=332953 Oct 28, 2023 13:02:56 James Knott <james.knott@jknott.net>:
On 2023-10-28 01:52, Damian wrote:
Yes it can, but only in cli with nmcli nmcli c con-name.mtu 12345
So that prevents it from learning the MTU from DHCP. Seems broken to me.
On 2023-10-28 16:22, Damian wrote:
According to this link, you must unset MTU from NM in order to get it from dhclient. https://bugzilla.gnome.org/show_bug.cgi?id=332953
I'll have to give that a try. Seems to me I shouldn't have to though. tnx
participants (2)
-
Damian -
James Knott