---
features:
  - Use the value of the network 'mtu' attribute for the MTU
    of virtual network interfaces such as veth pairs, patch
    ports, and tap devices involving a particular network.
  - Enable end-to-end support for arbitrary MTUs including
    jumbo frames between instances and provider networks by
    moving MTU disparities between flat or VLAN networks and
    overlay networks from layer-2 devices to layer-3 devices
    that support path MTU discovery (PMTUD).
upgrade:
  - Does not change MTU for existing virtual network interfaces.
  - Actions that create virtual network interfaces on an existing
    network with the 'mtu' attribute containing a value greater
    than zero could cause issues for network traffic traversing
    existing and new virtual network interfaces.
fixes:
  - Explicitly configure MTU of virtual network interfaces
    rather than using default values or incorrect values that
    do not account for overlay protocol overhead.