ip/tunnel: Document "external" parameter

Add it to ip-link(8) "type gre" output help message
as well as to ip-link(8) page.

Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>

diff --git a/ip/link_gre.c b/ip/link_gre.c
index 896bb19ab4711e839611e9db0d7f6086db290b10..3c0b6d678afcfc950839e12f7defe5b45dd10f88 100644 (file)
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -43,6 +43,7 @@ static void print_usage(FILE *f)
                "                            [ [no]encap-csum ]\n"
                "                            [ [no]encap-csum6 ]\n"
                "                            [ [no]encap-remcsum ]\n"
+               "                            [ external ]\n"
                "                            [ fwmark MARK ]\n"
                "                            [ erspan IDX ]\n"
                "\n"

diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
index 94ecbeced7145ae1fa5e0f147815383cb27b34f8..9ddf0ffbdbe51cd82bf582f848de2d1da36c3393 100644 (file)
--- a/man/man8/ip-link.8.in
+++ b/man/man8/ip-link.8.in
@@ -698,6 +698,8 @@ the following additional arguments are supported:
 .I " mode " { ip6ip | ipip | mplsip | any } "
 ] [
 .BR erspan " \fIIDX "
+] [
+.BR external
 ]
 
 .in +8
@@ -749,6 +751,11 @@ IPv6-Over-IPv4 is not supported for IPIP.
 indicates a 20 bit index/port number associated with the ERSPAN
 traffic's source port and direction.
 
+.sp
+.BR external
+- make this tunnel externally controlled
+.RB "(e.g. " "ip route encap" ).
+
 .in -8
 
 .TP