<para>Enables or disables automatic negotiation of transmission parameters.
Autonegotiation is a procedure by which two connected ethernet devices choose
common transmission parameters, such as speed, duplex mode, and flow control.
- Takes a boolean value. Unset by default, which means that the kernel default
- will be used.</para>
+ Takes a boolean value. When unset, the kernel's default will be used.</para>
<para>Note that if autonegotiation is enabled, speed, duplex and advertise settings are
read-only. If autonegotation is disabled, speed, duplex and advertise settings are writable
<listitem>
<para>The TCP Segmentation Offload (TSO) when true enables
TCP segmentation offload. Takes a boolean value.
- Defaults to "unset".</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>The TCP6 Segmentation Offload (tx-tcp6-segmentation) when true enables
TCP6 segmentation offload. Takes a boolean value.
- Defaults to "unset".</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>The Generic Segmentation Offload (GSO) when true enables
generic segmentation offload. Takes a boolean value.
- Defaults to "unset".</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>The Generic Receive Offload (GRO) when true enables
generic receive offload. Takes a boolean value.
- Defaults to "unset".</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>The Large Receive Offload (LRO) when true enables
large receive offload. Takes a boolean value.
- Defaults to "unset".</para>
+ When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
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 setting applies.
+ When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<listitem>
<para>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 setting applies.
+ between hosts and multicast routers. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<term><varname>VLANFiltering=</varname></term>
<listitem>
<para>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 setting applies.
+ If enabled, the bridge will be started in VLAN-filtering mode. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>STP=</varname></term>
<listitem>
- <para>A boolean. This enables the bridge's Spanning Tree Protocol (STP). When unset,
- the kernel's default setting applies.
+ <para>A boolean. This enables the bridge's Spanning Tree Protocol (STP).
+ When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<term><varname>GVRP=</varname></term>
<listitem>
<para>The Generic VLAN Registration Protocol (GVRP) is a protocol that
- allows automatic learning of VLANs on a network. A boolean. When unset,
- the kernel's default setting applies.</para>
+ allows automatic learning of VLANs on a network. A boolean.
+ When unset, the kernel's default will be used.
+ </para>
</listitem>
</varlistentry>
<varlistentry>
<para>Multiple VLAN Registration Protocol (MVRP) formerly known as GARP VLAN
Registration Protocol (GVRP) is a standards-based Layer 2 network protocol,
for automatic configuration of VLAN information on switches. It was defined
- in the 802.1ak amendment to 802.1Q-2005. A boolean. When unset, the kernel's
- default setting applies.</para>
+ in the 802.1ak amendment to 802.1Q-2005. A boolean. When unset, the kernel's default will be used.
+ </para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>The VLAN loose binding mode, in which only the operational state is passed
from the parent to the associated VLANs, but the VLAN device state is not changed.
- A boolean. When unset, the kernel's default setting applies.</para>
+ A boolean. When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ReorderHeader=</varname></term>
<listitem>
<para>The VLAN reorder header is set VLAN interfaces behave like physical interfaces.
- A boolean. When unset, the kernel's default setting applies.</para>
+ A boolean. When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
</variablelist>
<term><varname>AllowLocalRemote=</varname></term>
<listitem>
<para>A boolean. When true allows tunnel traffic on <varname>ip6tnl</varname> devices where the remote endpoint is a local host address.
- Defaults to unset.
+ When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<term><varname>SerializeTunneledPackets=</varname></term>
<listitem>
<para>Takes a boolean value. If set to yes, then packets are serialized. Only applies for ERSPAN tunnel.
- Defaults to unset.
+ When unset, the kernel's default will be used.
</para>
</listitem>
</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>
+ for this interface. 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>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>
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>
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>
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=yes</option> but has no effect if
- <option>IPv6ProxyNDP</option> has been set to false. Defaults to unset.
+ <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>
<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 argument. When true enables TCP quick ack mode for the route. When unset, the kernel's default will be used.
</para>
</listitem>
</varlistentry>
<listitem><para>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>
<listitem>
<para>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>
<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>
+ 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>
+ processed by the bridge port. When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>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>
<listitem>
<para>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 / commitdiff
