ovs-ofctl: Improve description of mod_nw_tos action.

Reported-by: Murphy McCauley <murphy.mccauley@gmail.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/utilities/ovs-ofctl.8.in b/utilities/ovs-ofctl.8.in
index e7d9cfb..3cc618d 100644 (file)
--- a/utilities/ovs-ofctl.8.in
+++ b/utilities/ovs-ofctl.8.in
@@ -962,9 +962,9 @@ Sets the TCP or UDP source port to \fIport\fR.
 Sets the TCP or UDP destination port to \fIport\fR.
 .
 .IP \fBmod_nw_tos\fB:\fItos\fR
-Sets the IPv4 ToS/DSCP field to \fItos\fR.  Valid values are between 0 and
-255, inclusive.  Note that the two lower reserved bits are never
-modified.
+Sets the IPv4 ToS/DSCP field to \fItos\fR, which must be a multiple of
+4 between 0 and 255.  This action does not modify the two least
+significant bits of the ToS field (the ECN bits).
 .RE
 .IP
 The following actions are Nicira vendor extensions that, as of this writing, are