Uninterruptible Power Supply (UPS) Management Protocol -- Commands and Responses
draft-rprice-ups-management-protocol-02
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Roger Price
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2021-03-06
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IETF R. Price, Ed.
Internet-Draft Network UPS Tools Project
Intended status: Informational 6 March 2021
Expires: 7 September 2021
Uninterruptible Power Supply (UPS) Management Protocol -- Commands and
Responses
draft-rprice-ups-management-protocol-02
Abstract
This text describes the command/response protocol currently used in
the management of Uninterruptible Power Supply (UPS) units and other
power devices often deployed in small offices, and in IT
installations subject to an erratic public power supply. The UPS
units typically interface to an Attachment Daemon in the system they
protect. This daemon is in turn polled by a Management Daemon which
notifies users and system administrators of power supply incidents,
and takes system shutdown decisions. The commands and responses
described by this text are exchanged between the UPS Attachment
Daemon and the Management Daemon. Current practice leads to weak
security and this is addressed in the Security and IANA
Considerations.
Status of This Memo
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 7 September 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
Price Expires 7 September 2021 [Page 1]
Internet-Draft UPS management protocol March 2021
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 Simplified BSD License text
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. How to read this text . . . . . . . . . . . . . . . . . . 4
1.2. Current practice . . . . . . . . . . . . . . . . . . . . 4
1.3. Requirements Language . . . . . . . . . . . . . . . . . . 4
1.4. Comments . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Attachment Daemon . . . . . . . . . . . . . . . . . . . . 5
2.2. Driver . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3. Event . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4. Instant Command . . . . . . . . . . . . . . . . . . . . . 5
2.5. Management Daemon . . . . . . . . . . . . . . . . . . . . 5
2.6. NUT (Network UPS Tools) Project . . . . . . . . . . . . . 6
2.7. Primary . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8. Secondary . . . . . . . . . . . . . . . . . . . . . . . . 6
2.9. Session . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.10. UPS status . . . . . . . . . . . . . . . . . . . . . . . 7
2.11. UPS variable . . . . . . . . . . . . . . . . . . . . . . 7
3. Protocol overview . . . . . . . . . . . . . . . . . . . . . . 7
4. Protocol specification . . . . . . . . . . . . . . . . . . . 9
4.1. Notation used in this specification . . . . . . . . . . . 9
4.2. Commands . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.1. "FSD" . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.2. "GET" . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.2.1. "CMDDESC" . . . . . . . . . . . . . . . . . . . . 10
4.2.2.2. "DESC" . . . . . . . . . . . . . . . . . . . . . 11
4.2.2.3. "NUMLOGINS" . . . . . . . . . . . . . . . . . . . 11
4.2.2.4. "TYPE" . . . . . . . . . . . . . . . . . . . . . 11
4.2.2.5. "UPSDESC" . . . . . . . . . . . . . . . . . . . . 12
4.2.2.6. "VAR" . . . . . . . . . . . . . . . . . . . . . . 13
4.2.3. "HELP" . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.4. "INSTCMD" . . . . . . . . . . . . . . . . . . . . . . 13
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