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Index: head/share/man/man5/rc.conf.5
===================================================================
--- head/share/man/man5/rc.conf.5
+++ head/share/man/man5/rc.conf.5
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd October 24, 2017
+.Dd December 9, 2017
.Dt RC.CONF 5
.Os
.Sh NAME
@@ -1816,21 +1816,40 @@
Set to the list of
.Xr gif 4
tunnel interfaces to configure on this host.
-A
-.Va gifconfig_ Ns Aq Ar interface
-variable is assumed to exist for each value of
-.Ar interface .
+For each
+.Xr gif
+tunnel interface, set a variable named
+.Va ifconfig_ Ns Aq Ar interface
+with the parameters for the
+.Xr ifconfig 8
+command to configure the link level for
+.Ar interface
+with the
+.Cm tunnel
+option.
The value of this variable is used to configure the link layer of the
-tunnel according to the syntax of the
+tunnel using the
.Cm tunnel
option to
-.Xr ifconfig 8 .
+.Xr ifconfig .
+For example, configure two
+.Xr gif
+interfaces with:
+.Bd -literal -offset indent
+gif_interfaces="gif0 gif1"
+ifconfig_gif0="tunnel src_addr0 dst_addr0"
+ifconfig_gif1="tunnel src_addr1 dst_addr1"
+.Ed
+.Pp
Additionally, this option ensures that each listed interface is created
via the
.Cm create
option to
-.Xr ifconfig 8
-before attempting to configure it.
+.Xr ifconfig .
+This example also works with
+.Va cloned_interfaces
+instead of
+.Va gif_interfaces .
.It Va sppp_interfaces
.Pq Vt str
Set to the list of

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