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<samba:parameter name="interfaces"
context="G"
type="cmdlist"
xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<description>
<para>This option allows you to override the default
network interfaces list that Samba will use for browsing, name
registration and other NetBIOS over TCP/IP (NBT) traffic. By default Samba will query
the kernel for the list of all active interfaces and use any
interfaces except 127.0.0.1 that are broadcast capable.</para>
<para>The option takes a list of interface strings. Each string
can be in any of the following forms:</para>
<itemizedlist>
<listitem><para>a network interface name (such as eth0).
This may include shell-like wildcards so eth* will match
any interface starting with the substring "eth"</para></listitem>
<listitem><para>an IP address. In this case the netmask is
determined from the list of interfaces obtained from the
kernel</para></listitem>
<listitem><para>an IP/mask pair. </para></listitem>
<listitem><para>a broadcast/mask pair.</para></listitem>
</itemizedlist>
<para>The "mask" parameters can either be a bit length (such
as 24 for a C class network) or a full netmask in dotted
decimal form.</para>
<para>The "IP" parameters above can either be a full dotted
decimal IP address or a hostname which will be looked up via
the OS's normal hostname resolution mechanisms.</para>
<para>
By default Samba enables all active interfaces that are broadcast capable
except the loopback adaptor (IP address 127.0.0.1).
</para>
<para>
In order to support SMB3 multi-channel configurations, smbd understands
some extra parameters which can be appended after the actual interface with
this extended syntax (note that the quoting is important in order to handle the ; and ,
characters):
</para>
<para>
"interface[;key1=value1[,key2=value2[...]]]"
</para>
<para>
Known keys are speed, capability, and if_index. Speed is specified in
bits per second. Known capabilities are RSS and RDMA. The
if_index should be used with care: the values must not coincide with
indexes used by the kernel.
Note that these options are mainly intended for testing and
development rather than for production use. At least on Linux systems,
these values should be auto-detected, but the settings can serve
as last a resort when autodetection is not working or is not available.
The specified values overwrite the auto-detected values.
</para>
<para>
The first two example below configures three network interfaces corresponding
to the eth0 device and IP addresses 192.168.2.10 and 192.168.3.10.
The netmasks of the latter two interfaces would be set to 255.255.255.0.
</para>
<para>
The other examples show how per interface extra parameters can be specified.
Notice the possible usage of "," and ";", which makes
the double quoting necessary.
</para>
</description>
<related>bind interfaces only</related>
<value type="example">eth0 192.168.2.10/24 192.168.3.10/255.255.255.0</value>
<value type="example">eth0, 192.168.2.10/24; 192.168.3.10/255.255.255.0</value>
<value type="example">"eth0;if_index=65,speed=1000000000,capability=RSS"</value>
<value type="example">"lo;speed=1000000000" "eth0;capability=RSS"</value>
<value type="example">"lo;speed=1000000000" , "eth0;capability=RSS"</value>
<value type="example">"eth0;capability=RSS" , "rdma1;capability=RDMA" ; "rdma2;capability=RSS,capability=RDMA"</value>
<value type="default"/>
</samba:parameter>
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