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-rw-r--r--Documentation/networking/netconsole.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/networking/netconsole.rst b/Documentation/networking/netconsole.rst
index 4ab5d7b05cf1..694bca4803d5 100644
--- a/Documentation/networking/netconsole.rst
+++ b/Documentation/networking/netconsole.rst
@@ -141,6 +141,11 @@ The interface exposes these parameters of a netconsole target to userspace:
transmit_errors Number of packet send errors (read-only)
=============== ================================= ============
+local_ip is optional: if it is left unset, netconsole derives a source
+address from the egress interface when the target is enabled. Writing any
+value to it, including 0.0.0.0, uses that value verbatim and disables the
+automatic selection.
+
The "enabled" attribute is also used to control whether the parameters of
a target can be updated or not -- you can modify the parameters of only
disabled targets (i.e. if "enabled" is 0).