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D39465.diff
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diff --git a/share/man/man4/bridge.4 b/share/man/man4/bridge.4
--- a/share/man/man4/bridge.4
+++ b/share/man/man4/bridge.4
@@ -35,7 +35,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd September 7, 2022
+.Dd April 10, 2023
.Dt IF_BRIDGE 4
.Os
.Sh NAME
@@ -118,6 +118,15 @@
For unicast traffic, the bridge learns which MAC addresses are associated
with which interfaces and will forward the traffic selectively.
.Pp
+By default the bridge logs MAC address port flapping to
+.Xr syslog 3 .
+This behavior can be disabled by setting the
+.Xr sysctl 8
+variable
+.Va net.link.bridge.log_mac_flap
+to
+.Li 0 .
+.Pp
All the bridged member interfaces need to be up in order to pass network traffic.
These can be enabled using
.Xr ifconfig 8
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D39465: bridge.4: Document the net.link.bridge.log_mac_flap variable
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