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BGP: Add option 'free bind'

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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.
This commit is contained in:
Ondrej Zajicek (work)
2022-01-09 02:40:58 +01:00
parent 87a02489f3
commit 60e9def9ef
4 changed files with 17 additions and 4 deletions
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doc/bird.sgml
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@@ -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