| Internet-Draft | BFD YANG | February 2022 |
| Rajaguru | Expires 26 August 2022 | [Page] |
This document defines a extension YANG data model that can be used to manage Hardware Offloaded Bidirectional Forwarding Detection (BFD).¶
This document specially talks about BFD sessions that are offloaded to hardware.¶
The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA).¶
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.¶
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.¶
Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."¶
This Internet-Draft will expire on 26 August 2022.¶
Copyright (c) 2022 IETF Trust and the persons identified as the document authors. All rights reserved.¶
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
This document defines an extension YANG data model to base model [RFC9127] that can be used to manage BFD sessions that are offloaded to hardware. BFD is a network protocol which is used for liveness detection of arbitrary paths between systems.¶
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
This document uses the graphical representation of data models defined in [RFC8340].¶
This yang model which is extension to base BFD yang mode been designed to manage BFD HW offloaded sessions. This new "bfd" container is augmented by all the YANG modules for their respective specific information:¶
An "ip-sh-ext" node is added under "bfd" node in control-plane-protocol. The operational state data for each BFD IP single-hop session is under this "ip-sh-ext" node.¶
module: ietf-bfd-ip-sh-ext
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/bfd:bfd/bfd-ip-sh:ip-sh
/bfd-ip-sh:sessions/bfd-ip-sh:session:
+--rw ip-sh-ext
+--ro session-running-ext
+--ro session-offloaded? boolean
¶
An "ip-mh-ext" node is added under "bfd" node in control-plane-protocol. The operational state data for each BFD IP multi-hop session is under this "ip-mh-ext" node.¶
module: ietf-bfd-ip-mh-ext
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/bfd:bfd/bfd-ip-mh:ip-mh
/bfd-ip-mh:session-groups/bfd-ip-mh:session-group:
+rw session-offloaded? boolean
¶
An "lag-ext" node is added under "bfd" node in control-plane-protocol. The operational state data for each BFD Over LAG session is under this "lag-ext" node.¶
module: ietf-bfd-lag-ext
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/bfd:bfd/bfd-lag:lag
/bfd-lag:sessions/bfd-lag:session:
+rw session-offloaded? boolean
¶
This YANG module imports "ietf-bfd-ip-sh" from RFC9127 and augments.¶
<CODE BEGINS> file "ietf-bfd-ip-sh-ext@2022-02-22.yang"
module ietf-bfd-ip-sh-ext {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-ip-sh-ext";
prefix "bfd-ip-sh-ext";
import ietf-bfd {
prefix "bfd";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
import ietf-routing {
prefix "rt";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA version)";
}
import ietf-bfd-ip-sh {
prefix "bfd-ip-sh";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
organization "IETF BFD Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/bfd>
WG List: <rtg-bfd@ietf.org>
Editors: Rajaguru Veluchamy (rvelucha@cisco.com)";
description
"This module contains the YANG definition for BFD IP single-hop
as per RFC 5881 with some extended info.
Copyright (c) 2018 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
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
reference
"RFC 5881: Bidirectional Forwarding Detection (BFD)
for IPv4 and IPv6 (Single Hop)
RFC 9127: YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
revision 2022-02-18 {
description "Initial revision.";
reference
"RFC XXXX: A YANG data model for BFD IP single-hop extension";
}
/*
* Augments
*/
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/bfd:bfd/bfd-ip-sh:ip-sh/"
+ "bfd-ip-sh:sessions/bfd-ip-sh:session" {
description "BFD augmentation for IP single-hop-ext";
leaf session-offloaded {
type boolean;
description
"Indicates whether BFD session is running in hardware";
}
}
}
<CODE ENDS>¶
This YANG module imports "ietf-bfd-ip-mh" from RFC9127 and augments.¶
<CODE BEGINS> file "ietf-bfd-ip-mh-ext@2022-02-22.yang"
module ietf-bfd-ip-mh-ext {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-ip-mh-ext";
prefix "bfd-ip-mh-ext";
import ietf-bfd {
prefix "bfd";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
import ietf-routing {
prefix "rt";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA version)";
}
import ietf-bfd-ip-mh {
prefix "bfd-ip-mh";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
organization "IETF BFD Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/bfd>
WG List: <rtg-bfd@ietf.org>
Editors: Rajaguru Veluchamy (rvelucha@cisco.com)";
description
"This module contains the YANG definition for BFD IP single-hop
as per RFC 5881 with some extended info.
Copyright (c) 2018 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
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
reference
"RFC 5881: Bidirectional Forwarding Detection (BFD)
for IPv4 and IPv6 (Single Hop)
RFC 9127: YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
revision 2022-02-18 {
description "Initial revision.";
reference
"RFC XXXX: A YANG data model for BFD IP single-hop extension";
}
/*
* Augments
*/
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/bfd:bfd/bfd-ip-mh:ip-mh/"
+ "bfd-ip-mh:session-groups/bfd-ip-mh:session-group" {
description "BFD augmentation for IP multi-hop-ext";
leaf session-offloaded {
type boolean;
description
"Indicates whether BFD session is running in hardware";
}
}
}
<CODE ENDS>¶
This YANG module imports "ietf-bfd-lag" from RFC9127 and augments.¶
<CODE BEGINS> file "ietf-bfd-lag-ext@2022-02-22.yang"
module ietf-bfd-lag-ext {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-bfd-lag-ext";
prefix "bfd-lag-ext";
import ietf-bfd {
prefix "bfd";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
import ietf-routing {
prefix "rt";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA version)";
}
import ietf-bfd-lag {
prefix "bfd-lag";
reference
"RFC 9127: A YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
}
organization "IETF BFD Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/bfd>
WG List: <rtg-bfd@ietf.org>
Editors: Rajaguru Veluchamy (rvelucha@cisco.com)";
description
"This module contains the YANG definition for BFD IP single-hop
as per RFC 5881 with some extended info.
Copyright (c) 2018 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
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
reference
"RFC 5881: Bidirectional Forwarding Detection (BFD)
for IPv4 and IPv6 (Single Hop)
RFC 9127: YANG Data Model for Bidirectional Forwarding
Detection (BFD)";
revision 2022-02-18 {
description "Initial revision.";
reference
"RFC XXXX: A YANG data model for BFD IP single-hop extension";
}
/*
* Augments
*/
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/bfd:bfd/bfd-lag:lag/"
+ "bfd-lag:sessions/bfd-lag:session" {
description "BFD augmentation for LAG ext";
leaf session-offloaded {
type boolean;
description
"Indicates whether BFD session is running in hardware";
}
}
}
<CODE ENDS>¶
TBD.¶
None.¶
I would like to thank Vengada Prasad Govindan for his support and guidance on this work.¶
RFC Editor: Remove this section upon publication as an RFC.¶