Index: ifconfig.8
===================================================================
RCS file: /home/ncvs/src/sbin/ifconfig/ifconfig.8,v
retrieving revision 1.35
diff -u -r1.35 ifconfig.8
--- ifconfig.8	2001/02/01 16:32:06	1.35
+++ ifconfig.8	2001/05/05 16:40:53
@@ -45,6 +45,7 @@
 .Op Ar address_family
 .Oo
 .Ar address
+.Op Ar /prefixlength
 .Op Ar dest_address
 .Oc
 .Op Ar parameters
@@ -87,6 +88,19 @@
 .Tn DARPA
 Internet address expressed in the Internet standard
 .Dq dot notation .
+.Pp
+It is also possible to use the CIDR notation (also known as the
+slash notation) to include the netmask, that is one can do things like 
+.Pp
+.Bd -ragged -compact
+.Nm
+.Bq inet|inet6
+.Aq interface
+.Aq address
+/
+.Aq prefixlength
+.Ed
+.Pp
 .\" For the Xerox Network Systems(tm) family,
 .\" addresses are 
 .\" .Ar net:a.b.c.d.e.f ,
@@ -325,6 +339,9 @@
 The mask should contain at least the standard network portion,
 and the subnet field should be contiguous with the network
 portion.
+.Pp
+The netmask can also be specified in CIDR notation after the address,
+see the address for more information.
 .It Cm prefixlen Ar len
 (Inet6 only)
 Specify that