diff --git a/HOWTO b/HOWTO
index f4ebac9..38f5dce 100644
--- a/HOWTO
+++ b/HOWTO
@@ -203,7 +203,9 @@
 filename=str	Fio normally makes up a filename based on the job name,
 		thread number, and file number. If you want to share
 		files between threads in a job or several jobs, specify
-		a filename for each of them to override the default.
+		a filename for each of them to override the default. If
+		the ioengine used is 'net', the filename is the host and
+		port to connect to in the format of =host:port.
 
 rw=str		Type of io pattern. Accepted values are:
 
@@ -278,6 +280,12 @@
 				to. This is mainly used to exercise fio
 				itself and for debugging/testing purposes.
 
+			net	Transfer over the network to given host:port.
+				'filename' must be set appropriately to
+				filename=host:port regardless of send
+				or receive, if the latter only the port
+				argument is used.
+
 iodepth=int	This defines how many io units to keep in flight against
 		the file. The default is 1 for each file defined in this
 		job, can be overridden with a larger value for higher