<varlistentry>
<term><varname>ARP=</varname></term>
<listitem>
- <para>A boolean. Enables or disables the ARP (low-level Address Resolution Protocol)
- for this interface. Defaults to unset, which means that the kernel default will be used.</para>
+ <para>Takes a boolean. If set to true, the ARP (low-level Address Resolution Protocol)
+ for this interface is enabled. When unset, the kernel's default will be used.</para>
<para> For example, disabling ARP is useful when creating multiple MACVLAN or VLAN virtual
interfaces atop a single lower-level physical interface, which will then only serve as a
link/"bridge" device aggregating traffic to the same physical link and not participate in
<varlistentry>
<term><varname>Multicast=</varname></term>
<listitem>
- <para>A boolean. Enables or disables the multicast flag on the device.</para>
+ <para>Takes a boolean. If set to true, the multicast flag on the device is enabled.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>AllMulticast=</varname></term>
<listitem>
- <para>A boolean. When this flag is set the driver retrieves all multicast packets from the network.
+ <para>Takes a boolean. If set to true, the driver retrieves all multicast packets from the network.
This happens when multicast routing is enabled.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Unmanaged=</varname></term>
<listitem>
- <para>A boolean. When <literal>yes</literal>, no attempts are
+ <para>Takes a boolean. When <literal>yes</literal>, no attempts are
made to bring up or configure matching links, equivalent to
when there are no matching network files. Defaults to
<literal>no</literal>.</para>
<varlistentry>
<term><varname>RequiredForOnline=</varname></term>
<listitem>
- <para>A boolean. When <literal>yes</literal>, the network is deemed
+ <para>Takes a boolean. When <literal>yes</literal>, the network is deemed
required when determining whether the system is online when running
<literal>systemd-networkd-wait-online</literal>.
When <literal>no</literal>, the network is ignored when checking for
the event that there is no address being assigned by DHCP or the
cable is not plugged in, the link will simply remain offline and be
skipped automatically by <literal>systemd-networkd-wait-online</literal>
- if <literal>RequiredForOnline=true</literal>.</para>
+ if <literal>RequiredForOnline=no</literal>.</para>
</listitem>
</varlistentry>
</variablelist>
<varlistentry>
<term><varname>DHCPServer=</varname></term>
<listitem>
- <para>A boolean. Enables DHCPv4 server support. Defaults
+ <para>Takes a boolean. If set to <literal>yes</literal>, DHCPv4 server will be start. Defaults
to <literal>no</literal>. Further settings for the DHCP
server may be set in the <literal>[DHCPServer]</literal>
section described below.</para>
<varlistentry>
<term><varname>IPv4LLRoute=</varname></term>
<listitem>
- <para>A boolean. When true, sets up the route needed for
+ <para>Takes a boolean. If set to true, sets up the route needed for
non-IPv4LL hosts to communicate with IPv4LL-only hosts. Defaults
to false.
</para>
<varlistentry>
<term><varname>LLMNR=</varname></term>
<listitem>
- <para>A boolean or <literal>resolve</literal>. When true,
+ <para>Takes a boolean or <literal>resolve</literal>. When true,
enables <ulink
url="https://tools.ietf.org/html/rfc4795">Link-Local
Multicast Name Resolution</ulink> on the link. When set to
<varlistentry>
<term><varname>MulticastDNS=</varname></term>
<listitem>
- <para>A boolean or <literal>resolve</literal>. When true,
+ <para>Takes a boolean or <literal>resolve</literal>. When true,
enables <ulink
url="https://tools.ietf.org/html/rfc6762">Multicast
DNS</ulink> support on the link. When set to
<varlistentry>
<term><varname>DNSSEC=</varname></term>
<listitem>
- <para>A boolean or
+ <para>Takes a boolean. or
<literal>allow-downgrade</literal>. When true, enables
<ulink
url="https://tools.ietf.org/html/rfc4033">DNSSEC</ulink>
<listitem><para>Configures IP packet forwarding for the
system. If enabled, incoming packets on any network
interface will be forwarded to any other interfaces
- according to the routing table. Takes either a boolean
- argument, or the values <literal>ipv4</literal> or
+ according to the routing table. Takes a boolean,
+ or the values <literal>ipv4</literal> or
<literal>ipv6</literal>, which only enable IP packet
forwarding for the specified address family. This controls
the <filename>net.ipv4.ip_forward</filename> and
</varlistentry>
<varlistentry>
<term><varname>IPv6AcceptRA=</varname></term>
- <listitem><para>Enable or disable IPv6 Router Advertisement (RA) reception support for the interface. Takes
- a boolean parameter. If true, RAs are accepted; if false, RAs are ignored, independently of the local
- forwarding state. When not set, the kernel default is used, and RAs are accepted only when local forwarding
+ <listitem><para>Takes a boolean. Controls IPv6 Router Advertisement (RA) reception support for the interface.
+ If true, RAs are accepted; if false, RAs are ignored, independently of the local forwarding state.
+ If unset, the kernel's default is used, and RAs are accepted only when local forwarding
is disabled for that interface. When RAs are accepted, they may trigger the start of the DHCPv6 client if
the relevant flags are set in the RA data, or if no routers are found on the link.</para>
<varlistentry>
<term><varname>IPv6DuplicateAddressDetection=</varname></term>
<listitem><para>Configures the amount of IPv6 Duplicate
- Address Detection (DAD) probes to send. Defaults to unset.
+ Address Detection (DAD) probes to send. When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Configures IPv6 Hop Limit. For each router that
forwards the packet, the hop limit is decremented by 1. When the
hop limit field reaches zero, the packet is discarded.
- Defaults to unset.
+ When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>IPv4ProxyARP=</varname></term>
- <listitem><para>A boolean. Configures proxy ARP for IPv4. Proxy ARP is the technique in which one host,
+ <listitem><para>Takes a boolean. Configures proxy ARP for IPv4. Proxy ARP is the technique in which one host,
usually a router, answers ARP requests intended for another machine. By "faking" its identity,
the router accepts responsibility for routing packets to the "real" destination. (see <ulink
url="https://tools.ietf.org/html/rfc1027">RFC 1027</ulink>.
- Defaults to unset.
+ When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>IPv6ProxyNDP=</varname></term>
- <listitem><para>A boolean. Configures proxy NDP for IPv6. Proxy NDP (Neighbor Discovery
+ <listitem><para>Takes a boolean. Configures proxy NDP for IPv6. Proxy NDP (Neighbor Discovery
Protocol) is a technique for IPv6 to allow routing of addresses to a different
destination when peers expect them to be present on a certain physical link.
In this case a router answers Neighbour Advertisement messages intended for
which can also be shown by <command>ip -6 neighbour show proxy</command>.
systemd-networkd will control the per-interface `proxy_ndp` switch for each configured
interface depending on this option.
- Defautls to unset.
+ When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<listitem><para>An IPv6 address, for which Neighbour Advertisement messages will be
proxied. This option may be specified more than once. systemd-networkd will add the
<option>IPv6ProxyNDPAddress=</option> entries to the kernel's IPv6 neighbor proxy table.
- This option implies <option>IPv6ProxyNDP=true</option> but has no effect if
- <option>IPv6ProxyNDP</option> has been set to false. Defaults to unset.
+ This option implies <option>IPv6ProxyNDP=yes</option> but has no effect if
+ <option>IPv6ProxyNDP</option> has been set to false. When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<varlistentry>
<term><varname>IPv6MTUBytes=</varname></term>
<listitem><para>Configures IPv6 maximum transmission unit (MTU).
- An integer greater than or equal to 1280 bytes. Defaults to unset.
+ An integer greater than or equal to 1280 bytes. When unset, the kernel's default will be used.
</para></listitem>
</varlistentry>
<varlistentry>
<varlistentry>
<term><varname>ActiveSlave=</varname></term>
<listitem>
- <para>A boolean. Specifies the new active slave. The <literal>ActiveSlave=</literal>
+ <para>Takes a boolean. Specifies the new active slave. The <literal>ActiveSlave=</literal>
option is only valid for following modes:
<literal>active-backup</literal>,
<literal>balance-alb</literal> and
<varlistentry>
<term><varname>PrimarySlave=</varname></term>
<listitem>
- <para>A boolean. Specifies which slave is the primary device. The specified
+ <para>Takes a boolean. Specifies which slave is the primary device. The specified
device will always be the active slave while it is available. Only when the
primary is off-line will alternate devices be used. This is useful when
one slave is preferred over another, e.g. when one slave has higher throughput
<varlistentry>
<term><varname>ConfigureWithoutCarrier=</varname></term>
<listitem>
- <para>A boolean. Allows networkd to configure a specific link even if it has no carrier.
+ <para>Takes a boolean. Allows networkd to configure a specific link even if it has no carrier.
Defaults to false.
</para>
</listitem>
<varlistentry>
<term><varname>HomeAddress=</varname></term>
<listitem>
- <para>Takes a boolean argument. Designates this address the "home address" as defined in
+ <para>Takes a boolean. Designates this address the "home address" as defined in
<ulink url="https://tools.ietf.org/html/rfc6275">RFC 6275</ulink>.
Supported only on IPv6. Defaults to false.</para>
</listitem>
<varlistentry>
<term><varname>DuplicateAddressDetection=</varname></term>
<listitem>
- <para>Takes a boolean argument. Do not perform Duplicate Address Detection
+ <para>Takes a boolean. Do not perform Duplicate Address Detection
<ulink url="https://tools.ietf.org/html/rfc4862">RFC 4862</ulink> when adding this address.
Supported only on IPv6. Defaults to false.</para>
</listitem>
<varlistentry>
<term><varname>ManageTemporaryAddress=</varname></term>
<listitem>
- <para>Takes a boolean argument. If true the kernel manage temporary addresses created
+ <para>Takes a boolean. If true the kernel manage temporary addresses created
from this one as template on behalf of Privacy Extensions
<ulink url="https://tools.ietf.org/html/rfc3041">RFC 3041</ulink>. For this to become
active, the use_tempaddr sysctl setting has to be set to a value greater than zero.
<varlistentry>
<term><varname>PrefixRoute=</varname></term>
<listitem>
- <para>Takes a boolean argument. When adding or modifying an IPv6 address, the userspace
+ <para>Takes a boolean. When adding or modifying an IPv6 address, the userspace
application needs a way to suppress adding a prefix route. This is for example relevant
together with IFA_F_MANAGERTEMPADDR, where userspace creates autoconf generated addresses,
but depending on on-link, no route for the prefix should be added. Defaults to false.</para>
<varlistentry>
<term><varname>AutoJoin=</varname></term>
<listitem>
- <para>Takes a boolean argument. Joining multicast group on ethernet level via
+ <para>Takes a boolean. Joining multicast group on ethernet level via
<command>ip maddr</command> command would not work if we have an Ethernet switch that does
IGMP snooping since the switch would not replicate multicast packets on ports that did not
have IGMP reports for the multicast addresses. Linux vxlan interfaces created via
<para>Specifies the outgoing device to match. The outgoing interface is only available for packets originating from local sockets that are bound to a device.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>SourcePort=</varname></term>
+ <listitem>
+ <para>Specifies the source IP port or IP port range match in forwarding information base (FIB) rules.
+ A port range is specified by the lower and upper port separated by a dash. Defaults to unset.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>DestinationPort=</varname></term>
+ <listitem>
+ <para>Specifies the destination IP port or IP port range match in forwarding information base (FIB) rules.
+ A port range is specified by the lower and upper port separated by a dash. Defaults to unset.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>IPProtocol=</varname></term>
+ <listitem>
+ <para>Specifies the IP protocol to match in forwarding information base (FIB) rules. Takes IP protocol name such as <literal>tcp</literal>,
+ <literal>udp</literal> or <literal>sctp</literal>, or IP protocol number such as <literal>6</literal> for <literal>tcp</literal> or
+ <literal>17</literal> for <literal>udp</literal>.
+ Defaults to unset.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>InvertRule=</varname></term>
+ <listitem>
+ <para>A boolean. Specifies wheather the rule to be inverted. Defaults to false.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
<varlistentry>
<term><varname>GatewayOnlink=</varname></term>
<listitem>
- <para>The <literal>GatewayOnlink</literal> option tells the kernel that it does not have
+ <para>Takes a boolean. If set to true, the kernel does not have
to check if the gateway is reachable directly by the current machine (i.e., the kernel does
not need to check if the gateway is attached to the local network), so that we can insert the
- route in the kernel table without it being complained about. A boolean, defaults to <literal>no</literal>.
+ route in the kernel table without it being complained about. Defaults to <literal>no</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Protocol=</varname></term>
<listitem>
- <para>The Protocol identifier for the route. Takes a number between 0 and 255 or the special values
+ <para>The protocol identifier for the route. Takes a number between 0 and 255 or the special values
<literal>kernel</literal>, <literal>boot</literal> and <literal>static</literal>. Defaults to
<literal>static</literal>.
</para>
<varlistentry>
<term><varname>Type=</varname></term>
<listitem>
- <para>The Type identifier for special route types, which can be
- <literal>unicast</literal> route to a destination network address which describes the path to the destination,
- <literal>blackhole</literal> packets are discarded silently,
- <literal>unreachable</literal> packets are discarded and the ICMP message host unreachable is generated,
- <literal>prohibit</literal> packets are discarded and the ICMP message communication administratively
- prohibited is generated. Defaults to <literal>unicast</literal>.
+ <para>Specifies the type for the route. If <literal>unicast</literal>, a regular route is defined, i.e. a
+ route indicating the path to take to a destination network address. If <literal>blackhole</literal>, packets
+ to the defined route are discarded silently. If <literal>unreachable</literal>, packets to the defined route
+ are discarded and the ICMP message "Host Unreachable" is generated. If <literal>prohibit</literal>, packets
+ to the defined route are discarded and the ICMP message "Communication Administratively Prohibited" is
+ generated. If <literal>throw</literal>, route lookup in the current routing table will fail and the route
+ selection process will return to Routing Policy Database (RPDB). Defaults to <literal>unicast</literal>.
</para>
</listitem>
</varlistentry>
<para>The TCP initial congestion window is used during the start of a TCP connection. During the start of a TCP
session, when a client requests a resource, the server's initial congestion window determines how many data bytes
will be sent during the initial burst of data. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual
- suffixes K, M, G are supported and are understood to the base of 1024. Defaults to unset.
+ suffixes K, M, G are supported and are understood to the base of 1024. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<para>The TCP initial advertised receive window is the amount of receive data (in bytes) that can initally be buffered at one time
on a connection. The sending host can send only that amount of data before waiting for an acknowledgment and window update
from the receiving host. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual suffixes K, M, G are supported
- and are understood to the base of 1024. Defaults to unset.
+ and are understood to the base of 1024. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>QuickAck=</varname></term>
<listitem>
- <para>Takes a boolean argument. When true enables TCP quick ack mode for the route. Defaults to unset.
+ <para>Takes a boolean. When true enables TCP quick ack mode for the route. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<listitem>
<para>When true, the interface maximum transmission unit
from the DHCP server will be used on the current link.
+ If <varname>MTUBytes=</varname> is set, then this setting is ignored.
Defaults to false.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Anonymize=</varname></term>
<listitem>
- <para>Takes a boolean argument. When true, the options sent to the DHCP server will
+ <para>Takes a boolean. When true, the options sent to the DHCP server will
follow the <ulink url="https://tools.ietf.org/html/rfc7844">RFC 7844</ulink>
(Anonymity Profiles for DHCP Clients) to minimize disclosure of identifying information.
Defaults to false.</para>
<varlistentry>
<term><varname>UseDomains=</varname></term>
<listitem>
- <para>Takes a boolean argument, or the special value <literal>route</literal>. When true, the domain name
+ <para>Takes a boolean, or the special value <literal>route</literal>. When true, the domain name
received from the DHCP server will be used as DNS search domain over this link, similar to the effect of
the <option>Domains=</option> setting. If set to <literal>route</literal>, the domain name received from
the DHCP server will be used for routing DNS queries only, but not for searching, similar to the effect of
<varlistentry>
<term><varname>RapidCommit=</varname></term>
<listitem>
- <para>A boolean. The DHCPv6 client can obtain configuration parameters from a DHCPv6 server through
+ <para>Takes a boolean. The DHCPv6 client can obtain configuration parameters from a DHCPv6 server through
a rapid two-message exchange (solicit and reply). When the rapid commit option is enabled by both
the DHCPv6 client and the DHCPv6 server, the two-message exchange is used, rather than the default
four-method exchange (solicit, advertise, request, and reply). The two-message exchange provides
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>ForceDHCPv6PDOtherInformation=</varname></term>
+ <listitem>
+ <para>Takes a boolean that enforces DHCPv6 stateful mode when the 'Other information' bit is set in
+ Router Advertisement messages. By default setting only the 'O' bit in Router Advertisements
+ makes DHCPv6 request network information in a stateless manner using a two-message Information
+ Request and Information Reply message exchange.
+ <ulink url="https://tools.ietf.org/html/rfc7084">RFC 7084</ulink>, requirement WPD-4, updates
+ this behavior for a Customer Edge router so that stateful DHCPv6 Prefix Delegation is also
+ requested when only the 'O' bit is set in Router Advertisements. This option enables such a CE
+ behavior as it is impossible to automatically distinguish the intention of the 'O' bit otherwise.
+ By default this option is set to 'false', enable it if no prefixes are delegated when the device
+ should be acting as a CE router.</para>
+ </listitem>
+ </varlistentry>
+
</variablelist>
</refsect1>
<varlistentry>
<term><varname>UseDomains=</varname></term>
<listitem>
- <para>Takes a boolean argument, or the special value <literal>route</literal>. When true, the domain name
+ <para>Takes a boolean, or the special value <literal>route</literal>. When true, the domain name
received via IPv6 Router Advertisement (RA) will be used as DNS search domain over this link, similar to
the effect of the <option>Domains=</option> setting. If set to <literal>route</literal>, the domain name
received via IPv6 RA will be used for routing DNS queries only, but not for searching, similar to the
<term><varname>EmitDNS=</varname></term>
<term><varname>DNS=</varname></term>
- <listitem><para>Configures whether the DHCP leases handed out
- to clients shall contain DNS server information. The
- <varname>EmitDNS=</varname> setting takes a boolean argument
- and defaults to <literal>yes</literal>. The DNS servers to
- pass to clients may be configured with the
+ <listitem><para>Takes a boolean. Configures whether the DHCP leases handed out
+ to clients shall contain DNS server information. Defaults to <literal>yes</literal>.
+ The DNS servers to pass to clients may be configured with the
<varname>DNS=</varname> option, which takes a list of IPv4
addresses. If the <varname>EmitDNS=</varname> option is
enabled but no servers configured, the servers are
<term><varname>EmitTimezone=</varname></term>
<term><varname>Timezone=</varname></term>
- <listitem><para>Configures whether the DHCP leases handed out
- to clients shall contain timezone information. The
- <varname>EmitTimezone=</varname> setting takes a boolean
- argument and defaults to <literal>yes</literal>. The
+ <listitem><para>Takes a boolean. Configures whether the DHCP leases handed out
+ to clients shall contain timezone information. Defaults to <literal>yes</literal>. The
<varname>Timezone=</varname> setting takes a timezone string
(such as <literal>Europe/Berlin</literal> or
<literal>UTC</literal>) to pass to clients. If no explicit
<term><varname>Managed=</varname></term>
<term><varname>OtherInformation=</varname></term>
- <listitem><para>Controls whether a DHCPv6 server is used to acquire IPv6
- addresses on the network link when <varname>Managed=</varname> boolean
+ <listitem><para>Takes a boolean. Controls whether a DHCPv6 server is used to acquire IPv6
+ addresses on the network link when <varname>Managed=</varname>
is set to <literal>true</literal> or if only additional network
information can be obtained via DHCPv6 for the network link when
- <varname>OtherInformation=</varname> boolean is set to
+ <varname>OtherInformation=</varname> is set to
<literal>true</literal>. Both settings default to
<literal>false</literal>, which means that a DHCPv6 server is not being
used.</para></listitem>
<varlistentry>
<term><varname>RouterLifetimeSec=</varname></term>
- <listitem><para>Configures the IPv6 router lifetime in seconds. If set,
+ <listitem><para>Takes a timespan. Configures the IPv6 router lifetime in seconds. If set,
this host also announces itself in Router Advertisements as an IPv6
- router for the network link. Defaults to unset, which means the host is
- not acting as a router.</para>
+ router for the network link. When unset, the host is not acting as a router.</para>
</listitem>
</varlistentry>
<term><varname>AddressAutoconfiguration=</varname></term>
<term><varname>OnLink=</varname></term>
- <listitem><para>Boolean values to specify whether IPv6 addresses can be
+ <listitem><para>Takes a boolean to specify whether IPv6 addresses can be
autoconfigured with this prefix and whether the prefix can be used for
onlink determination. Both settings default to <literal>true</literal>
in order to ease configuration.
<varlistentry>
<term><varname>UnicastFlood=</varname></term>
<listitem>
- <para>A boolean. Controls whether the bridge should flood
+ <para>Takes a boolean. Controls whether the bridge should flood
traffic for which an FDB entry is missing and the destination
- is unknown through this port. Defaults to unset.
+ is unknown through this port. When unset, the kernel's default will be used.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>MulticastToUnicast=</varname></term>
+ <listitem>
+ <para>Takes a boolean. Multicast to unicast works on top of the multicast snooping feature of
+ the bridge. Which means unicast copies are only delivered to hosts which are interested in it.
+ When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>HairPin=</varname></term>
<listitem>
- <para>A boolean. Configures whether traffic may be sent back
- out of the port on which it was received. Defaults to unset. When this
- flag is false, and the bridge will not forward traffic back
- out of the receiving port.</para>
+ <para>Takes a boolean. Configures whether traffic may be sent back
+ out of the port on which it was received. When this flag is false, and the bridge
+ will not forward traffic back out of the receiving port.
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>UseBPDU=</varname></term>
<listitem>
- <para>A boolean. Configures whether STP Bridge Protocol Data Units will be
- processed by the bridge port. Defaults to unset.</para>
+ <para>Takes a boolean. Configures whether STP Bridge Protocol Data Units will be
+ processed by the bridge port. When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>FastLeave=</varname></term>
<listitem>
- <para>A boolean. This flag allows the bridge to immediately stop multicast
+ <para>Takes a boolean. This flag allows the bridge to immediately stop multicast
traffic on a port that receives an IGMP Leave message. It is only used with
- IGMP snooping if enabled on the bridge. Defaults to unset.</para>
+ IGMP snooping if enabled on the bridge. When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>AllowPortToBeRoot=</varname></term>
<listitem>
- <para>A boolean. Configures whether a given port is allowed to
+ <para>Takes a boolean. Configures whether a given port is allowed to
become a root port. Only used when STP is enabled on the bridge.
- Defaults to unset.</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
projects / thirdparty / systemd.git / blobdiff