This patch changes BGP from only listening mode for BFD status updates to interactive mode of dynamically registering/deregistering BFD enabled peers with PTM/BFD through zebra. Peer is registered with BFD when it goes into established state and de-registers when it goes out of establish state.

This patch also adds BFD multihop support for BGP. Whether a peer is multi-hop or single hop is determined internally. All IGP peers are considered as multi-hop peers. EBGP peers are considered as single hop unless configured as multi-hop.

BGP BFD command enhancement to configure BFD parameters (detect multiplier, min rx and min tx).

router bgp <as-number>
  neighbor <name/ip-address> bfd <detect mult> <min rx> <min tx>

Signed-off-by: Radhika Mahankali <radhika@cumulusnetworks.com>
Reviewed-by:   Dinesh G Dutt <ddutt@cumulusnetworks.com>
Reviewed-by:   Vipin Kumar <vipin@cumulusnetworks.com>
Reviewed-by:   Kanna Rajagopal <kanna@cumulusnetworks.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/zebra.h b/lib/zebra.h
index c1231e4c8b..387cd65415 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -434,7 +434,11 @@ struct in_pktinfo
 #define ZEBRA_IMPORT_ROUTE_UNREGISTER     31
 #define ZEBRA_IMPORT_CHECK_UPDATE         32
 #define ZEBRA_IPV4_ROUTE_IPV6_NEXTHOP_ADD 33
-#define ZEBRA_MESSAGE_MAX                 34
+#define ZEBRA_BFD_DEST_REGISTER           34
+#define ZEBRA_BFD_DEST_DEREGISTER         35
+#define ZEBRA_BFD_DEST_UPDATE             36
+#define ZEBRA_BFD_DEST_REPLAY             37
+#define ZEBRA_MESSAGE_MAX                 38
 
 /* Marker value used in new Zserv, in the byte location corresponding
  * the command value in the old zserv header. To allow old and new