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-rw-r--r--doc/bird.sgml20
1 files changed, 17 insertions, 3 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index badfe649..b9ccf9f7 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2783,9 +2783,16 @@ using the following configuration parameters:
<tag><label id="bgp-hold-time">hold time <m/number/</tag>
Time in seconds to wait for a Keepalive message from the other side
- before considering the connection stale. Default: depends on agreement
- with the neighboring router, we prefer 240 seconds if the other side is
- willing to accept it.
+ before considering the connection stale. The effective value is
+ negotiated during session establishment and it is a minimum of this
+ configured value and the value proposed by the peer. The zero value has
+ a special meaning, signifying that no keepalives are used. Default: 240
+ seconds.
+
+ <tag><label id="bgp-min-hold-time">min hold time <m/number/</tag>
+ Minimum value of the hold time that is accepted during session negotiation.
+ If the peer proposes a lower value, the session is rejected with error.
+ Default: none.
<tag><label id="bgp-startup-hold-time">startup hold time <m/number/</tag>
Value of the hold timer used before the routers have a chance to exchange
@@ -2793,8 +2800,15 @@ using the following configuration parameters:
<tag><label id="bgp-keepalive-time">keepalive time <m/number/</tag>
Delay in seconds between sending of two consecutive Keepalive messages.
+ The effective value depends on the negotiated hold time, as it is scaled
+ to maintain proportion between the keepalive time and the hold time.
Default: One third of the hold time.
+ <tag><label id="bgp-min-keepalive-time">min keepalive time <m/number/</tag>
+ Minimum value of the keepalive time that is accepted during session
+ negotiation. If the proposed hold time would lead to a lower value of
+ the keepalive time, the session is rejected with error. Default: none.
+
<tag><label id="bgp-connect-delay-time">connect delay time <m/number/</tag>
Delay in seconds between protocol startup and the first attempt to
connect. Default: 5 seconds.