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-rw-r--r--man/systemd-nspawn.xml36
1 files changed, 21 insertions, 15 deletions
diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index bd688a0ee1..57c0a223af 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -524,15 +524,23 @@
<term><option>-n</option></term>
<term><option>--network-veth</option></term>
- <listitem><para>Create a virtual Ethernet link
- (<literal>veth</literal>) between host and container. The host
- side of the Ethernet link will be available as a network
- interface named after the container's name (as specified with
- <option>--machine=</option>), prefixed with
- <literal>ve-</literal>. The container side of the Ethernet
- link will be named <literal>host0</literal>. Note that
- <option>--network-veth</option> implies
- <option>--private-network</option>.</para></listitem>
+ <listitem><para>Create a virtual Ethernet link (<literal>veth</literal>) between host and container. The host
+ side of the Ethernet link will be available as a network interface named after the container's name (as
+ specified with <option>--machine=</option>), prefixed with <literal>ve-</literal>. The container side of the
+ Ethernet link will be named <literal>host0</literal>. The <option>--network-veth</option> option implies
+ <option>--private-network</option>.</para>
+
+ <para>Note that
+ <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ includes by default a network file <filename>/usr/lib/systemd/network/80-container-ve.network</filename>
+ matching the host-side interfaces created this way, which contains settings to enable automatic address
+ provisioning on the created virtual link via DHCP, as well as automatic IP routing onto the host's external
+ network interfaces. It also contains <filename>/usr/lib/systemd/network/80-container-host0.network</filename>
+ matching the container-side interface created this way, containing settings to enable client side address
+ assignment via DHCP. In case <filename>systemd-networkd</filename> is running on both the host and inside the
+ container, automatic IP communication from the container to the host is thus available, with further
+ connectivity to the external network.</para>
+ </listitem>
</varlistentry>
<varlistentry>
@@ -553,12 +561,10 @@
<varlistentry>
<term><option>--network-bridge=</option></term>
- <listitem><para>Adds the host side of the Ethernet link
- created with <option>--network-veth</option> to the specified
- bridge. Note that <option>--network-bridge=</option> implies
- <option>--network-veth</option>. If this option is used, the
- host side of the Ethernet link will use the
- <literal>vb-</literal> prefix instead of
+ <listitem><para>Adds the host side of the Ethernet link created with <option>--network-veth</option> to the
+ specified Ethernet bridge interface. Expects a valid network interface name of a bridge device as
+ argument. Note that <option>--network-bridge=</option> implies <option>--network-veth</option>. If this option
+ is used, the host side of the Ethernet link will use the <literal>vb-</literal> prefix instead of
<literal>ve-</literal>.</para></listitem>
</varlistentry>