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-rw-r--r--Documentation/networking/operstates.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/networking/operstates.rst b/Documentation/networking/operstates.rst
index f6b9cce5b201..1ee2141e8ef1 100644
--- a/Documentation/networking/operstates.rst
+++ b/Documentation/networking/operstates.rst
@@ -73,7 +73,9 @@ IF_OPER_LOWERLAYERDOWN (3):
state (f.e. VLAN).
IF_OPER_TESTING (4):
- Unused in current kernel.
+ Interface is in testing mode, for example executing driver self-tests
+ or media (cable) test. It can't be used for normal traffic until tests
+ complete.
IF_OPER_DORMANT (5):
Interface is L1 up, but waiting for an external event, f.e. for a