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-rw-r--r--doc/networking/driver.t5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/networking/driver.t b/doc/networking/driver.t
index d762223449..5de7b54991 100644
--- a/doc/networking/driver.t
+++ b/doc/networking/driver.t
@@ -134,7 +134,10 @@ structure.
@item ifp->if_name
The name of the device. The network stack uses this string
-and the device number for device name lookups.
+and the device number for device name lookups. The name should not
+contain digits as these will be assumed to be part of the unit number
+and not part of the device name.
+
@item ifp->if_unit
The device number. The network stack uses this number and the