Properties for device type bridges

Properties for device type bridges:

interfaces (sequence of scalars)

All devices matching this ID list will be added to the bridge. This may
be an empty list, in which case the bridge will be brought online with
no member interfaces.

Example:

ethernets:
  switchports:
  match: {name: "enp2*"}
[...]
bridges:
  br0:
  interfaces: [switchports]

parameters (mapping)

Customization parameters for special bridging options. Time intervals
may need to be expressed as a number of seconds or milliseconds: the
default value type is specified below. If necessary, time intervals can
be qualified using a time suffix (such as “s” for seconds, “ms” for
milliseconds) to allow for more control over its behavior.

ageing-time (scalar)

Set the period of time to keep a MAC address in the forwarding
database after a packet is received. This maps to the AgeingTimeSec=
property when the networkd renderer is used. If no time suffix is
specified, the value will be interpreted as seconds.

priority (scalar)

Set the priority value for the bridge. This value should be a
number between 0 and 65535. Lower values mean higher
priority. The bridge with the higher priority will be elected as
the root bridge.

port-priority (scalar)

Set the port priority to . The priority value is
a number between 0 and 63. This metric is used in the
designated port and root port selection algorithms.

forward-delay (scalar)

Specify the period of time the bridge will remain in Listening and
Learning states before getting to the Forwarding state. This field
maps to the ForwardDelaySec= property for the networkd renderer.
If no time suffix is specified, the value will be interpreted as
seconds.

hello-time (scalar)

Specify the interval between two hello packets being sent out from
the root and designated bridges. Hello packets communicate
information about the network topology. When the networkd renderer
is used, this maps to the HelloTimeSec= property. If no time suffix
is specified, the value will be interpreted as seconds.

max-age (scalar)

Set the maximum age of a hello packet. If the last hello packet is
older than that value, the bridge will attempt to become the root
bridge. This maps to the MaxAgeSec= property when the networkd
renderer is used. If no time suffix is specified, the value will be
interpreted as seconds.

path-cost (scalar)

Set the cost of a path on the bridge. Faster interfaces should have
a lower cost. This allows a finer control on the network topology
so that the fastest paths are available whenever possible.

stp (bool)

Define whether the bridge should use Spanning Tree Protocol. The
default value is “true”, which means that Spanning Tree should be
used.