The [Bridge] section only applies for netdevs of kind "bridge",
and accepts the following keys:
HelloTimeSec=
HelloTimeSec specifies the number of seconds between two
hello packets sent out by the root bridge and the designated
bridges. Hello packets are used to communicate information
about the topology throughout the entire bridged local area
network.
MaxAgeSec=
MaxAgeSec specifies the number of seconds of maximum message
age. If the last seen (received) hello packet is more than
this number of seconds old, the bridge in question will start
the takeover procedure in attempt to become the Root Bridge
itself.
ForwardDelaySec=
ForwardDelaySec specifies the number of seconds spent in each
of the Listening and Learning states before the Forwarding
state is entered.
AgeingTimeSec=
This specifies the number of seconds a MAC Address will be
kept in the forwarding database after having a packet
received from this MAC Address.
Priority=
The priority of the bridge. An integer between 0 and 65535. A
lower value means higher priority. The bridge having the
lowest priority will be elected as root bridge.
GroupForwardMask=
A 16-bit bitmask represented as an integer which allows
forwarding of link local frames with 802.1D reserved
addresses (01:80:C2:00:00:0X). A logical AND is performed
between the specified bitmask and the exponentiation of 2^X,
the lower nibble of the last octet of the MAC address. For
example, a value of 8 would allow forwarding of frames
addressed to 01:80:C2:00:00:03 (802.1X PAE).
DefaultPVID=
This specifies the default port VLAN ID of a newly attached
bridge port. Set this to an integer in the range 1...4094 or
"none" to disable the PVID.
MulticastQuerier=
Takes a boolean. This setting controls the
IFLA_BR_MCAST_QUERIER option in the kernel. If enabled, the
kernel will send general ICMP queries from a zero source
address. This feature should allow faster convergence on
startup, but it causes some multicast-aware switches to
misbehave and disrupt forwarding of multicast packets. When
unset, the kernel's default will be used.
MulticastSnooping=
Takes a boolean. This setting controls the
IFLA_BR_MCAST_SNOOPING option in the kernel. If enabled, IGMP
snooping monitors the Internet Group Management Protocol
(IGMP) traffic between hosts and multicast routers. When
unset, the kernel's default will be used.
VLANFiltering=
Takes a boolean. This setting controls the
IFLA_BR_VLAN_FILTERING option in the kernel. If enabled, the
bridge will be started in VLAN-filtering mode. When unset,
the kernel's default will be used.
VLANProtocol=
Allows setting the protocol used for VLAN filtering. Takes
802.1q or, 802.1ad, and defaults to unset and kernel's
default is used.
STP=
Takes a boolean. This enables the bridge's Spanning Tree
Protocol (STP). When unset, the kernel's default will be
used.
MulticastIGMPVersion=
Allows changing bridge's multicast Internet Group Management
Protocol (IGMP) version. Takes an integer 2 or 3. When unset,
the kernel's default will be used.
