---
systemd_networkd_network:
  default:
    - Match:
      - Name: eth*
    - Network:
      - DHCP: ipv4

---
systemd_networkd_network:
  default:
    - Match:
      - Name: eth*
    - Network:
      - DHCP: ipv4
    - DHCP:
      - UseMTU: true

Make systemd use DHCP MTU
Make systemd use DHCP MTU

systemd-networkd doesn't use DHCP MTU by default [1]. It defaults to
1500 regardless of what DHCP dishes out. Fix it so that MTU will be set
via DHCP for instances on MTU 9000 networks.

[1] https://www.freedesktop.org/software/systemd/man/systemd.network.html#%5BDHCP%5D%20Section%20Options

Change-Id: Id212e0b8a7f9d61c28d87a0d1658db99c24916e8
