BFD: Option to specify which class of BFD sessions are accepted

[thirdparty/bird.git] / doc / bird.sgml

diff --git a/doc/bird.sgml b/doc/bird.sgml
index 8548c9c6f8addef116dccb780916f62fc7957128..b965da87828c18727a43b64b5a9f745091122f88 100644 (file)
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1955,6 +1955,7 @@ milliseconds.
 
 <code>
 protocol bfd [&lt;name&gt;] {
+       accept [ipv4|ipv6] [direct|multihop];
        interface &lt;interface pattern&gt; {
                interval &lt;time&gt;;
                min rx interval &lt;time&gt;;
@@ -1989,6 +1990,14 @@ protocol bfd [&lt;name&gt;] {
 </code>
 
 <descrip>
+       <tag><label id="bfd-accept">accept [ipv4|ipv6] [direct|multihop]</tag>
+       A BFD protocol instance accepts (by default) all BFD session requests
+       (with regard to VRF restrictions, see above). This option controls
+       whether IPv4 / IPv6 and direct / multihop session requests are accepted
+       (and which listening sockets are opened). It can be used, for example,
+       to configure separate BFD protocol instances for IPv4 and for IPv6
+       sessions.
+
        <tag><label id="bfd-iface">interface <m/pattern/ [, <m/.../] { <m/options/ }</tag>
        Interface definitions allow to specify options for sessions associated
        with such interfaces and also may contain interface specific options.