I saw in https://github.com/systemd/systemd/pull/6936 that networkd's UseMTU will be enabled by default in 235. There is an bug https://github.com/systemd/systemd/issues/6593 that causes networkd to loop continually setting and unsetting the MTU on most real hardware if UseMTU is set and the the DHCP lease specifies a larger value than what the driver is currently using.
This can be reproduced on with the e1000 ethernet driver as well as ixgbe. See https://github.com/coreos/bugs/issues/1827#issuecomment-321129028 for reproduction setups using a Container Linux image and dnsmasq locally. This bug should be fixed before UseMTU is enabled by default. -Andrew Jeddeloh _______________________________________________ systemd-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/systemd-devel
