+.B defaultroute6
+Add a default IPv6 route to the system routing tables, using the peer as
+the gateway, when IPv6CP negotiation is successfully completed.
+This entry is removed when the PPP connection is broken. This option
+is privileged if the \fInodefaultroute6\fR option has been specified.
+\fBWARNING: Do not enable this option by default\fR. IPv6 routing tables
+are managed by kernel (as apposite to IPv4) and IPv6 default route is
+configured by kernel automatically too based on ICMPv6 Router Advertisement
+packets. This option may conflict with kernel IPv6 route setup and should
+be used only for broken IPv6 networks.
+.TP