--- src/share/man/man4/dummynet.4	2003/06/17 04:36:59	1.2
+++ src/share/man/man4/dummynet.4	2007/10/16 11:28:40	1.3
@@ -1,6 +1,6 @@
 .\"
 .\" $FreeBSD: src/share/man/man4/dummynet.4,v 1.4.2.12 2002/11/18 21:51:16 luigi Exp $
-.\" $DragonFly: src/share/man/man4/dummynet.4,v 1.1 2003/06/16 05:31:15 dillon Exp $
+.\" $DragonFly$
 .\"
 .Dd October 28, 2002
 .Dt DUMMYNET 4
@@ -34,20 +34,23 @@ operation:
   IPFIREWALL_VERBOSE_LIMIT - limit firewall output.
   DUMMYNET                 - enable dummynet operation.
   NMBCLUSTERS              - set the amount of network packet buffers
-  HZ                       - sets the timer granularity
 .Ed
 .Pp
 Generally, the following options are required:
 .Bd -literal
   options IPFIREWALL
   options DUMMYNET
-  options HZ=1000	# strongly recommended
 .Ed
 .Pp
 additionally, one may want to increase the number
 of mbuf clusters (used to store network packets) according to the
 sum of the bandwidth-delay products and queue sizes of all configured
 pipes.
+Timer granularity is controlled by
+.Xr sysctl 8
+variable
+.Va net.inet.ip.dummynet.hz ,
+which is set to 1000 by default.
 .Sh SEE ALSO
 .Xr setsockopt 2 ,
 .Xr bridge 4 ,