[Bug 1717471] Re: networkd does not accept / set advertised mtu

[Dimitri John Ledkov]

<wgrant> netplan needs to set DHCP.UseMTU=yes
<wgrant> If I do that, my local instance no longer behaves strangely, and the MTU is correctly 1458

** Also affects: nplan (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  networkd does not accept / set advertised mtu

Status in nplan package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  <wgrant> Right, so as far as I can tell the neutron-api on lcy01 is
  configured to advertise an instance interface MTU of 1400, though
  that's lower than it has to be, and the new DHCP setup with networkd
  just doesn't respect that DHCP option.

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