draft-ietf-bfd-optimizing-authentication-06.txt   draft-ietf-bfd-optimizing-authentication-07.txt 
Network Working Group M. Jethanandani Network Working Group M. Jethanandani
Internet-Draft VMware Internet-Draft VMware
Intended status: Standards Track A. Mishra Intended status: Standards Track A. Mishra
Expires: April 14, 2019 SES Networks Expires: May 15, 2019 SES Networks
A. Saxena A. Saxena
Ciena Corporation Ciena Corporation
M. Bhatia M. Bhatia
Nokia Nokia
October 11, 2018 November 11, 2018
Optimizing BFD Authentication Optimizing BFD Authentication
draft-ietf-bfd-optimizing-authentication-06 draft-ietf-bfd-optimizing-authentication-07
Abstract Abstract
This document describes an optimization to BFD Authentication as This document describes an optimization to BFD Authentication as
described in Section 6.7 of BFD RFC5880. described in Section 6.7 of BFD RFC5880.
Requirements Language Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on April 14, 2019. This Internet-Draft will expire on May 15, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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logic for sequence number maintenance remains unchanged from logic for sequence number maintenance remains unchanged from
[RFC5880]. If at a later time, a different scheme is adopted for [RFC5880]. If at a later time, a different scheme is adopted for
changing sequence number, this method can use the updated scheme changing sequence number, this method can use the updated scheme
without any impact. without any impact.
Most frames transmitted on a BFD session are BFD CC UP frames. Most frames transmitted on a BFD session are BFD CC UP frames.
Authenticating a small subset of these frames, for example, a detect Authenticating a small subset of these frames, for example, a detect
multiplier number of packets per configured period, significantly multiplier number of packets per configured period, significantly
reduces the computational demand for the system while maintaining reduces the computational demand for the system while maintaining
security of the session across the configured authentication periods. security of the session across the configured authentication periods.
The configuration of the periodic authentication interval for BFD CC A minimum of Detect Multiplier packets MUST be transmitted per
UP frames is an open issue, left for implementations to decide. configured periodic authentication interval. This ensures that the
BFD session should see at least one authenticated packet during that
interval.
3. NULL Auth TLV 3. NULL Auth TLV
This section describes a new Authentication TLV as: This section describes a new Authentication TLV as:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Auth Type | Auth Len | Auth Key ID | Reserved | | Auth Type | Auth Len | Auth Key ID | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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