From 60e9def9ef7b5d16f868b0fb4ab1192d59fd7541 Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Sun, 9 Jan 2022 02:40:58 +0100
Subject: BGP: Add option 'free bind'

The BGP 'free bind' option applies the IP_FREEBIND/IPV6_FREEBIND
socket option for the BGP listening socket.

Thanks to Alexander Zubkov for the idea.
---
 doc/bird.sgml | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'doc/bird.sgml')

diff --git a/doc/bird.sgml b/doc/bird.sgml
index a63493da..0112622e 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2412,6 +2412,12 @@ using the following configuration parameters:
 	same address family and using the same local port) should have set
 	<cf/strict bind/, or none of them. Default: disabled.
 
+	<tag><label id="bgp-free-bind">free bind <m/switch/</tag>
+	Use IP_FREEBIND socket option for the listening socket, which allows
+	binding to an IP address not (yet) assigned to an interface. Note that
+	all BGP instances that share a listening socket should have the same
+	value of the <cf/freebind/ option. Default: disabled.
+
 	<tag><label id="bgp-check-link">check link <M>switch</M></tag>
 	BGP could use hardware link state into consideration.  If enabled,
 	BIRD tracks the link state of the associated interface and when link
-- 
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