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diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index 5d033e77d..751dd00fd 100644
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -60,7 +60,10 @@
Virtual Network Device files must have the extension
.netdev; other extensions are ignored. Virtual
- network devices are created as soon as networkd is started.
+ network devices are created as soon as networkd is started. If a netdev
+ with the specified name already exists, networkd will use that as-is
+ rather than create its own. Note that the settings of the pre-existing
+ netdev will not be changed by networkd.
The .netdev files are read from the files located in the
system network directory /usr/lib/systemd/network,
@@ -80,6 +83,184 @@
+
+ Supported netdev kinds
+
+ The following kinds of virtual network devices may be configured in .netdev files:
+
+
+
+ bond
+
+ A bond device is an aggregation of all its slave devices. See
+
+ Linux Ethernet Bonding Driver HOWTO for details.
+
+
+
+
+
+
+ bridge
+
+ A bridge devcie is a software switch, each of its slave devices and the bridge itself are ports of the switch.
+
+
+
+
+
+
+ dummy
+
+ A dummy device drops all packets sent to it.
+
+
+
+
+
+
+ gre
+
+ A Level 3 GRE tunnel over IPv4. See
+
+ RFC 2784 for details.
+
+
+
+
+
+
+ gretap
+
+ A Level 2 GRE tunnel over IPv4.
+
+
+
+
+
+
+ ip6gre
+
+ A Level 3 GRE tunnel over IPv6.
+
+
+
+
+
+
+ ip6tnl
+
+ An IPv4 or IPv6 tunnel over IPv6
+
+
+
+
+
+
+ ip6gretap
+
+ An Level 2 GRE tunnel over IPv6.
+
+
+
+
+
+
+ ipip
+
+ An IPv4 over IPv4 tunnel.
+
+
+
+
+
+
+ ipvlan
+
+ An ipvlan device is a stacked device which receives packets from its
+ underlying device based on IP address filtering.
+
+
+
+
+
+
+ macvlan
+
+ A macvlan device is a stacked device which receives packets from its
+ underlying device based on MAC address filtering.
+
+
+
+
+
+
+ sit
+
+ An IPv6 over IPv4 tunnel.
+
+
+
+
+
+
+ tap
+
+ A persistent Level 2 tunnel between a network device and a device node.
+
+
+
+
+
+
+ tun
+
+ A persistent Level 3 tunnel between a network device and a device node.
+
+
+
+
+
+
+ veth
+
+ An ethernet tunnel between a pair of network devices.
+
+
+
+
+
+
+ vlan
+
+ A vlan is a stacked device which receives packets from its underlying
+ device based on VLAN tagging. See
+
+ IEEE 802.1Q for details.
+
+
+
+
+
+
+ vti
+
+ An IPv4 over IPSec tunnel.
+
+
+
+
+
+
+ vxlan
+
+
+
+
+
+
+
+
[Match] Section Options
@@ -158,13 +339,8 @@
Kind=
- The netdev kind. Currently, bridge,
- bond, vlan,
- macvlan, vxlan,
- ipip, gre,
- sit, vti,
- veth, and dummy
- are supported. This option is compulsory.
+ The netdev kind. This option is compulsory. See the Supported netdev kinds section
+ for the valid keys.
@@ -173,7 +349,9 @@
The maximum transmission unit in bytes to
set for the device. The usual suffixes K, M, G,
are supported and are understood to the base of
- 1024.
+ 1024. This key is not currently suported for
+ tun or tap devices.
+
@@ -183,6 +361,7 @@
If none is given, one is generated based on
the interface name and the
machine-id5.
+ This key is not currently suported for tun or tap devices.
@@ -226,6 +405,26 @@
+
+
+ [IPVLAN] Section Options
+
+ The [IPVLAN] section only applies for netdevs of kind
+ ipvlan, and accepts the following key:
+
+
+
+ Mode=
+
+ The IPVLAN mode to use. The supported options are
+ L2 and L3.
+
+
+
+
+
+
+
[VXLAN] Section Options
The [VXLAN] section only applies for netdevs of kind
@@ -265,14 +464,45 @@
to discover remote MAC addresses.
+
+ FDBAgeingSec=
+
+ The lifetime of Forwarding Database entry learnt by the kernel in seconds.
+
+
+
+ ARPProxy=
+
+ A boolean. When true, enables ARP proxy.
+
+
+
+ L2MissNotification=
+
+ A boolean. When true, enables netlink LLADDR miss notifications.
+
+
+
+ L3MissNotification=
+
+ A boolean. When true, enables netlink IP ADDR miss notifications.
+
+
+
+ RouteShortCircuit=
+
+ A boolean. When true route short circuit is turned on.
+
+
[Tunnel] Section Options
The [Tunnel] section only applies for netdevs of kind
- ipip, sit, gre and
- vti and accepts the following keys:
+ ipip, sit, gre, gretap,
+ ip6gre, ip6gretap, vti and ip6tnl
+ and accepts the following keys:
@@ -314,6 +544,16 @@
A boolean. When true, enables Path MTU Discovery on the tunnel.
+
+ Mode=
+
+ An ip6tnl tunnels can have three modes
+ ip6ip6 for IPv6 over IPv6,
+ ipip6 for IPv4 over IPv6 or
+ any for either.
+
+
+
@@ -339,6 +579,142 @@
+
+ [Tun] Section Options
+
+ The [Tun] section only applies for netdevs of kind
+ tun, and accepts the following keys:
+
+
+
+ OneQueue=
+ Takes a boolean argument. Configures whether
+ all packets are queued at the device (enabled), or a fixed number
+ of packets are queued at the device and the rest at the
+ qdisc. Defaults to no.
+
+
+
+ MultiQueue=
+ Takes a boolean argument. Configures whether to
+ use multiple file descriptors (queues) to parallelize packets
+ sending and receiving. Defaults to no.
+
+
+
+ PacketInfo=
+ Takes a boolean argument. Configures whether packets
+ should be prepened with four extra bytes (two flag bytes and two
+ protocol bytes). If disabled it indicates that the packets will be
+ pure IP packets. Defaults to no.
+
+
+
+ User=
+ User to grant access to the /dev/net/tun
+ device.
+
+
+
+ Group=
+ Group to grant access to the /dev/net/tun
+ device.
+
+
+
+
+
+
+
+
+ [Tap] Section Options
+
+ The [Tap] section only applies for netdevs of kind
+ tap, and accepts the same keys as the
+ [Tun] section.
+
+
+
+ [Bond] Section Options
+
+ The [Bond] section accepts the following
+ key:
+
+
+
+ Mode=
+
+ Specifies one of the bonding policies. The default is
+ balance-rr (round robin). Possible values are
+ balance-rr,
+ active-backup,
+ balance-xor,
+ broadcast,
+ 802.3ad,
+ balance-tlb, and
+ balance-alb.
+
+
+
+
+
+ TransmitHashPolicy=
+
+ Selects the transmit hash policy to use for slave selection in
+ balance-xor, 802.3ad, and tlb modes. Possible values are
+ layer2,
+ layer3+4,
+ layer2+3,
+ encap2+3,
+ 802.3ad, and
+ encap3+4.
+
+
+
+
+
+ LACPTransmitRate=
+
+ Specifies the rate with which link partner
+ transmits Link Aggregation Control Protocol Data Unit packets
+ in 802.3ad mode. Possible values are
+ slow, which requests partner to transmit LACPDUs every 30 seconds, and
+ fast, which requests partner to transmit LACPDUs every second.
+ The default value is slow.
+
+
+
+
+ MIIMonitorSec=
+
+ Specifies the frequency that Media Independent Interface link
+ monitoring will occur. A value of zero disables MII link monitoring.
+ This values is rounded down to the nearest millisecond. The default
+ value is 0.
+
+
+
+
+ UpDelaySec=
+
+ Specifies the delay before a link is enabled after a link up
+ status has been detected. This value is rounded down to a multiple of
+ MIIMonitorSec. The default value is 0.
+
+
+
+
+ DownDelaySec=
+
+ Specifies the delay before a link is disabled after a link down
+ status has been detected. This value is rounded down to a multiple of
+ MIIMonitorSec. The default value is 0.
+
+
+
+
+
+
Example
@@ -374,6 +750,15 @@ Local=192.168.223.238
Remote=192.169.224.239
TTL=64
+
+ /etc/systemd/network/tap.netdev
+ [NetDev]
+Name=tap-test
+Kind=tap
+
+[Tap]
+MultiQueue=true
+PacketInfo=true
/etc/systemd/network/sit.netdev
@@ -436,6 +821,7 @@ MACAddress=12:34:56:78:9a:bc
systemd1,
systemd-networkd8,
+ systemd.link5,
systemd.network5