module ietf-bfd-ip-mh { namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-ip-mh"; // replace with IANA namespace when assigned prefix "bfd-ip-mh"; import ietf-bfd-types { prefix "bfd-types"; } import ietf-bfd { prefix "bfd"; } import ietf-inet-types { prefix "inet"; } import ietf-routing { prefix "rt"; } organization "IETF BFD Working Group"; contact "WG Web: WG List: Editors: Reshad Rahman (, Lianshu Zheng (, Mahesh Jethanandani ("; description "This module contains the YANG definition for BFD IP multi-hop as per RFC5883. Copyright (c) 2017 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents ( This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; revision 2017-10-30 { description "Initial revision."; reference "RFC XXXX: A YANG data model for BFD IP multi-hop"; } // RFC Ed.: replace XXXX with actual RFC number and remove this // note augment "/rt:routing/rt:control-plane-protocols/" + "rt:control-plane-protocol/bfd:bfd" { description "BFD augmentation for IP multi-hop"; container ip-mh { description "BFD IP multi-hop top level container"; uses bfd-types:session-statistics; list session-group { key "source-addr dest-addr"; description "Group of BFD IP multi-hop sessions (for ECMP). A " + "group of sessions is between 1 source and 1 " + "destination, each session has a different field " + "in UDP/IP hdr for ECMP."; leaf source-addr { type inet:ip-address; description "Local IP address"; } leaf dest-addr { type inet:ip-address; description "IP address of the peer"; } uses bfd-types:common-cfg-parms; leaf tx-ttl { type bfd-types:hops; default 255; description "Hop count of outgoing BFD control packets"; } leaf rx-ttl { type bfd-types:hops; mandatory true; description "Minimum allowed hop count value for incoming BFD control packets. Control packets whose hop count is lower than this value are dropped."; } list sessions { config false; description "The multiple BFD sessions between a source and a " + "destination."; uses bfd-types:all-session; } } } } notification multihop-notification { description "Notification for BFD multi-hop session state change. An " + "implementation may rate-limit notifications, e.g. when a" + "session is continuously changing state."; uses bfd-types:notification-parms; } }