bgpd: add new draft for redirect ip for flowspec

that new option will overwrite simpson draft. There is a new ecommunity
option whose type is 0x1 and subtype is 0xc. That option is defined
here on iana.org/assignments/bgp-extended-communities page:
- bgp-extended-communities.xhtml#trans-ipv4
It contains the IP address to redirect traffic to. The understanding of
the draft is the following one:
- if that community is only present, then the ip contained inside will
be chosen as nexthop.
- if that community is provided along with simpson extended community,
then only the new redirect ip draft will be used. however, both will be
displayed.
- in other cases, if there is only the simpson extended community, then
the nexthop IP of the NLRI will be chosen.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/bgpd/bgp_flowspec_vty.c b/bgpd/bgp_flowspec_vty.c
index 4fb055bcc..9c230d112 100644
--- a/bgpd/bgp_flowspec_vty.c
+++ b/bgpd/bgp_flowspec_vty.c
@@ -315,7 +315,8 @@ void route_vty_out_flowspec(struct vty *vty, struct prefix *p,
 		}
 		if (attr->nexthop.s_addr != 0 &&
 		    display == NLRI_STRING_FORMAT_LARGE)
-			vty_out(vty, "\tNH %-16s\n", inet_ntoa(attr->nexthop));
+			vty_out(vty, "\tNLRI NH %-16s\n",
+				inet_ntoa(attr->nexthop));
 		XFREE(MTYPE_ECOMMUNITY_STR, s);
 	}
 	peer_uptime(path->uptime, timebuf, BGP_UPTIME_LEN, 0, NULL);