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-rw-r--r--doc/bird.sgml10
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index 1191fa03..ae308d4c 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1691,6 +1691,7 @@ supports the following per-interface configuration options:
protocol babel [<name>] {
ipv4 { <channel config> };
ipv6 [sadr] { <channel config> };
+ randomize router id <switch>;
interface <interface pattern> {
type <wired|wireless>;
rxcost <number>;
@@ -1713,6 +1714,15 @@ protocol babel [<name>] {
<tag><label id="babel-channel">ipv4 | ipv6 [sadr] <m/channel config/</tag>
The supported channels are IPv4, IPv6, and IPv6 SADR.
+ <tag><label id="babel-random-router-id">randomize router id <m/switch/</tag>
+ If enabled, Bird will randomize the top 32 bits of its router ID whenever
+ the protocol instance starts up. If a Babel node restarts, it loses its
+ sequence number, which can cause its routes to be rejected by peers until
+ the state is cleared out by other nodes in the network (which can take on
+ the order of minutes). Enabling this option causes Bird to pick a random
+ router ID every time it starts up, which avoids this problem at the cost
+ of not having stable router IDs in the network. Default: no.
+
<tag><label id="babel-type">type wired|wireless </tag>
This option specifies the interface type: Wired or wireless. On wired
interfaces a neighbor is considered unreachable after a small number of