-.IP "\fBpssl:\fR[\fIport\fR][\fB:\fIip\fR]"
-.IQ "\fBptcp:\fR[\fIport\fR][\fB:\fIip\fR]"
+.IP "\fBpssl:\fR[\fIport\fR][\fB:\fIhost\fR]"
+.IQ "\fBptcp:\fR[\fIport\fR][\fB:\fIhost\fR]"
Listens for OpenFlow connections on \fIport\fR. The default
-\fIport\fR is 6653. By default, connections
-are allowed from any IPv4 address. Specify \fIip\fR as an IPv4
-address or a bracketed IPv6 address (e.g. \fBptcp:6653:[::1]\fR). DNS
-names may not be used. For \fBpssl\fR, the
+\fIport\fR is 6653. By default, connections are allowed from any IPv4
+address. Specify \fIhost\fR as an IPv4 address or a bracketed IPv6
+address (e.g. \fBptcp:6653:[::1]\fR). On Linux, use \fB%\fIdevice\fR
+to designate a scope for IPv6 link-level addresses,
+e.g. \fBptcp:6653:[fe80::1234%eth0]\fR. DNS names can
+be used if built with unbound library. For \fBpssl\fR, the
\fB\-\-private\-key\fR,\fB\-\-certificate\fR, and \fB\-\-ca\-cert\fR
options are mandatory.
.IP