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- Network Working Group: D. Gowin
- Request for Comments: 1708 Vitro Corp.
- Category: Informational October 1994
-
-
- NTP PICS PROFORMA
- For the Network Time Protocol Version 3
-
- Status of this Memo
-
- This memo provides information for the Internet community. This memo
- does not specify an Internet standard of any kind. Distribution of
- this memo is unlimited.
-
- Abstract
-
- This RFC describes a PICS Proforma translated into an Internet
- acceptable form. The Original document was developed according to
- ISO 9646 for conformance test purposes. This document is intended
- for both developers and users of the NTP (Network Time Protocol).
- This document contains specific information and performance
- characteristics for the use of NTP within the context of Internet
- usage. It is suggested, that users wishing to use the
- synchronization capabilities of the Internet abide by the
- characteristics set within this document.
-
- For more information please contact Dr. David Mills at Mills@udel.edu
- or review RFC 1305 for more information.
-
- 1. INTRODUCTION
-
- To evaluate conformance of a particular implementation, it is
- necessary to have a statement of the capabilities and options that
- have been implemented for a given protocol. Such a statement is
- called a Protocol Implementation Conformance Statement (PICS).
-
- 2. SCOPE
-
- This document provides the PICS proforma for the Network Time
- Protocol (NTP) in compliance with the relevant requirements, and in
- accordance with the relevant guidance, given in ISO/IEC 9646-2.
-
- 3. REFERENCE DOCUMENTS
-
- ISO/IEC 9646-1 1990, Information technology - Open systems
- interconnection - Conformance testing
- methodology and framework - Part 1: General
- concepts.
-
-
-
- Gowin [Page 1]
-
- RFC 1708 NTP PICS Proforma October 1994
-
-
- ISO/IEC 9646-2 1990, Information technology - Open systems
- interconnection - Conformance testing
- methodology and framework - Part 2: Abstract
- test suite specification.
-
- RFC 1305 Network Time Protocol (Version 3) -
- Specification, Implementation and Analysis -
- David L. Mills, University of Delaware -
- March 1992.
-
- 4. DEFINITIONS
-
- This document uses the following terms defined in ISO/IEC 9646-1:
-
- a) PICS proforma;
-
- b) Protocol Implementation Conformance Statement (PICS);
-
- c) Static conformance review.
-
- 4.1 SPECIAL SYMBOLS
-
- The additional symbols have been identified for use in this document:
-
- m Mandatory field/function
-
- o.# Optional field/function
-
- c# Conditional field/function
-
- # Refers to a note # below the table
-
- x Prohibited use
-
- n/a Not applicable
-
- Y[] Indicates the item is implemented
-
- N[] Indicates the item is not implemented
-
- 5. INSTRUCTIONS FOR COMPLETION OF PICS
-
- The supplier of a protocol implementation which is claimed to conform
- to NTP version 3 is required to complete a copy of the PICS proforma
- provided in this document and is required to provide the information
- necessary to identify both the supplier and the implementation.
-
-
-
-
-
- Gowin [Page 2]
-
- RFC 1708 NTP PICS Proforma October 1994
-
-
- 6. COPYRIGHT
-
- Copyright release for PICS proforma. Users of this RFC may freely
- reproduce the PICS proforma in this document so that it can be used
- for its intended purpose and may further publish the completed PICS.
-
- 7. IMPLEMENTATION IDENTIFICATION
-
- +=======================================+=======================+
- | SUPPLIER | |
- | | |
- +---------------------------------------+-----------------------+
- | | |
- | CONTACT POINT FOR | |
- | QUERIES ABOUT THE PICS | |
- | | |
- +---------------------------------------+-----------------------+
- | | |
- | IMPLEMENTATION NAME | |
- | AND VERSION | |
- | | |
- +---------------------------------------+-----------------------+
- | | |
- | OTHER INFORMATION | |
- | NECESSARY FOR FULL | |
- | IDENTIFICATION - e.g. | |
- | NAME AND VERSION | |
- | FOR MACHINES AND/OR | |
- | OPERATING SYSTEMS; | |
- | SYSTEM NAME | |
- | | |
- | | |
- | | |
- +=======================================+=======================+
-
- 8. NETWORK TIME PROTOCOL PICS PROFORMA
-
- 8.1 DATA FORMATS
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.1.01 64 bit time
- stamp 3.1 m Y[] N[]
-
-
-
-
-
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- Gowin [Page 3]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.2 STATE VARIABLES AND PARAMETERS
-
- 8.2.1 COMMON VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.1.01 Peer Address 3.2.1 m Y[] N[]
- 8.2.1.02 Peer Port 3.2.1 m Y[] N[]
- 8.2.1.03 Host Address 3.2.1 m Y[] N[]
- 8.2.1.04 Host Port 3.2.1 m Y[] N[]
- 8.2.1.05 Leap Indicator 3.2.1 m Y[] N[]
- 8.2.1.06 Mode 3.2.1 m Y[] N[]
- 8.2.1.07 Stratum 3.2.1 m Y[] N[]
- 8.2.1.08 Poll 3.2.1 m Y[] N[]
- 8.2.1.09 Precision 3.2.1 m Y[] N[]
- 8.2.1.10 Root Delay 3.2.1 m Y[] N[]
- 8.2.1.11 Root Dispersion 3.2.1 m Y[] N[]
- 8.2.1.12 Reference Clock
- Identifier 3.2.1 m Y[] N[]
- 8.2.1.13 Reference
- Timestamp 3.2.1 m Y[] N[]
- 8.2.1.14 Originate
- Timestamp 3.2.1 m Y[] N[]
- 8.2.1.15 Receive
- Timestamp 3.2.1 m Y[] N[]
- 8.2.1.16 Transmit
- Timestamp 3.2.1 m Y[] N[]
-
- 8.2.2 SYSTEM VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.2.01 Local Clock 3.2.2 m Y[] N[]
- 8.2.2.02 Clock Source 3.2.2 m Y[] N[]
-
- 8.2.3 PEER VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.3.01 Configured Bit 3.2.3 m Y[] N[]
- 8.2.3.02 Update Timestamp 3.2.3 m Y[] N[]
- 8.2.3.03 Reachability
- Register 3.2.3 m Y[] N[]
- 8.2.3.04 Peer Timer 3.2.3 m Y[] N[]
-
-
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- Gowin [Page 4]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.2.4 PACKET VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.4.01 Version Number 3.2.4 m Y[] N[]
-
- 8.2.5 CLOCK FILTER VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.5.01 Filter Register 3.2.5 m Y[] N[]
- 8.2.5.02 Valid Data
- Counter 3.2.5 m Y[] N[]
- 8.2.5.03 Offset 3.2.5 m Y[] N[]
- 8.2.5.04 Delay 3.2.5 m Y[] N[]
- 8.2.5.05 Dispersion 3.2.5 m Y[] N[]
-
- 8.2.6 AUTHENTICATION VARIABLES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.6.01 Authentication
- Enable Bit 3.2.6 c1 Y[] N[]
- 8.2.6.02 Authenticated
- Bit 3.2.6 c1 Y[] N[]
- 8.2.6.03 Key Identifier 3.2.6 c1 Y[] N[]
- 8.2.6.04 Cryptographic
- Keys 3.2.6 c1 Y[] N[]
- 8.2.6.05 Crypto Checksum 3.2.6 c1 Y[] N[]
-
- c1: IF authentication is used THEN m ELSE o.
-
- 8.2.7 PARAMETER VALUES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.7.01 Version Number = 3 3.2.7 c1 Y[] N[]
- 8.2.7.02 NTP Port = 123 3.2.7 c1 Y[] N[]
- 8.2.7.03 Max Stratum = 15 3.2.7 c1 Y[] N[]
- 8.2.7.04 Max Clock Age =
- 86,400 sec. 3.2.7 c1 Y[] N[]
- 8.2.7.05 Max Skew = 1 sec. 3.2.7 c1 Y[] N[]
- 8.2.7.06 Max Distance = 1 sec. 3.2.7 c1 Y[] N[]
- 8.2.7.07 Min Polling Interval =
- 6(64 sec.) 3.2.7 c1 Y[] N[]
- 8.2.7.08 Max Polling Interval =
- 10(1024 sec.) 3.2.7 c1 Y[] N[]
- 8.2.7.09 Min Select Clock = 1 3.2.7 c1 Y[] N[]
-
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- Gowin [Page 5]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.2.7.10 Max Select Clock = 10 3.2.7 c1 Y[] N[]
- 8.2.7.11 Min Dispersion =
- 0.01 sec. 3.2.7 c1 Y[] N[]
- 8.2.7.12 Max Dispersion =
- 16 sec. 3.2.7 c1 Y[] N[]
- 8.2.7.13 Reachability Reg
- Size = 8 3.2.7 c1 Y[] N[]
- 8.2.7.14 Filter Size = 8 3.2.7 c1 Y[] N[]
- 8.2.7.15 Filter Weight = 1/2 3.2.7 c1 Y[] N[]
- 8.2.7.16 Select Weight = 3/4 3.2.7 c1 Y[] N[]
-
- c1: IF implementation is intended for use on the Internet
- THEN m ELSE o.
-
- 8.2.8 MODES OF OPERATION
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.8.01 Symmetric Active 3.3 o.1 Y[] N[]
- 8.2.8.02 Symmetric Passive 3.3 o.1 Y[] N[]
- 8.2.8.03 Client 3.3 o.1 Y[] N[]
- 8.2.8.04 Server 3.3 o.1 Y[] N[]
- 8.2.8.05 Broadcast 3.3 o.1 Y[] N[]
-
- o.1:At least one mode must be implemented.
-
- 8.2.9 EVENT PROCESSING
-
- 8.2.9.1 TRANSMIT PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.1.01 Transmit Procedure 3.4.2 m Y[] N[]
- 8.2.9.1.02 Authentication 3.4.2 o Y[] N[]
-
- 8.2.9.2 RECEIVE PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.2.01 Receive Procedure 3.4.3 m Y[] N[]
- 8.2.9.2.02 Control Messages 3.4.3 o.1 Y[] N[]
- 8.2.9.2.03 Authentication 3.4.3 o Y[] N[]
-
- o.1:If implemented then section 8.6 must be completed.
-
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- Gowin [Page 6]
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- RFC 1708 NTP PICS Proforma October 1994
-
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- 8.2.9.3 PACKET PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.3.01 Packet Procedure 3.4.4 m Y[] N[]
- 8.2.9.3.02 Authentication 3.4.4 o Y[] N[]
-
- 8.2.9.4 CLOCK UPDATE PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.4.01 Clock Update 3.4.5 m Y[] N[]
-
- 8.2.9.5 PRIMARY CLOCK PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.5.01 Primary Clock 3.4.6 m Y[] N[]
-
- 8.2.9.6 INITIALIZATION PROCEDURES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.6.01 Initialization 3.4.7.1 m Y[] N[]
- 8.2.9.6.02 Authentication 3.4.7.1 o Y[] N[]
-
- 8.2.9.7 INITIALIZATION INSTANTIATION PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.7.01 Initialization
- Instantiation 3.4.7.2 m Y[] N[]
- 8.2.9.7.02 Authentication 3.4.7.2 o Y[] N[]
-
- 8.2.9.8 RECEIVE INSTANTIATION PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.8.01 Receive Instantiation 3.4.7.3 m Y[] N[]
- 8.2.9.8.02 Authentication 3.4.7.3 o Y[] N[]
-
- 8.2.9.9 PRIMARY CLOCK INSTANTIATION PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.9.01 Clock Instantiation 3.4.7.4 m Y[] N[]
-
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- Gowin [Page 7]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.2.9.10 CLEAR PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.10.01 Clear Proc. 3.4.8 m Y[] N[]
-
- 8.2.9.11 POLL UPDATE PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.11.01 Poll Update 3.4.9 m Y[] N[]
-
- 8.2.9.12 SYNCHRONIZATION DISTANCE PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.2.9.12.01 Distance Proc. 3.5 m Y[] N[]
-
- 8.3 FILTERING AND SELECTION ALGORITHMS
-
- 8.3.1 CLOCK FILTER PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.3.1.01 Clock Filter 4.1 o Y[] N[]
-
- 8.3.2 CLOCK SELECTION PROCEDURE
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.3.2.01 Clock Selection
- Procedure 4.2 o Y[] N[]
- 8.3.2.02 Intersection Algorithm 4.2.1 c1 Y[] N[]
- 8.3.2.03 Clustering Algorithm 4.2.2 c1 Y[] N[]
-
- c1: IF Clock Selection Procedure implemented THEN m ELSE o.
-
- 8.4 LOCAL CLOCKS
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.4.01 Logical Clock 5 m Y[] N[]
-
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- Gowin [Page 8]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.4.1 FUZZBALL LOCAL CLOCK IMPLEMENTATIONS
-
- 8.4.1.1 CRYSTAL OSCILLATOR BASED IMPLEMENTATION PARAMETER VALUES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.4.1.1.01 Adjustment Interval =
- 4 sec. 5.1 c1 Y[] N[]
- 8.4.1.1.02 PPS Timeout = 60 sec. 5.1 c1 Y[] N[]
- 8.4.1.1.02 Step Timeout =
- 900 sec. 5.1 c1 Y[] N[]
- 8.4.1.1.02 Maximum Aperture =
- q128 ms 5.1 c1 Y[] N[]
- 8.4.1.1.03 Frequency Weight = 16 5.1 c1 Y[] N[]
- 8.4.1.1.04 Phase Weight = 8 5.1 c1 Y[] N[]
- 8.4.1.1.05 Compliance Weight = 13 5.1 c1 Y[] N[]
- 8.4.1.1.06 Compliance Maximum = 4 5.1 c1 Y[] N[]
- 8.4.1.1.07 Compliance
- Multiplier = 4 5.1 c1 Y[] N[]
-
- c1:IF implementing a fuzzball using a crystal oscillator
- based local clock THEN m ELSE o.
-
- 8.4.1.2 MAIN SYSTEM CLOCK IMPLEMENTATION PARAMETER VALUES
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.4.1.2.01 Adjustment
- Interval = 1 sec. 5.1 c1 Y[] N[]
- 8.4.1.2.02 PPS Timeout = 60 sec. 5.1 c1 Y[] N[]
- 8.4.1.2.02 Step Timeout =
- 900 sec. 5.1 c1 Y[] N[]
- 8.4.1.2.02 Maximum Aperture =
- q512 ms 5.1 c1 Y[] N[]
- 8.4.1.2.03 Frequency Weight = 16 5.1 c1 Y[] N[]
- 8.4.1.2.04 Phase Weight = 9 5.1 c1 Y[] N[]
- 8.4.1.2.05 Compliance Weight = 13 5.1 c1 Y[] N[]
- 8.4.1.2.06 Compliance Maximum = 4 5.1 c1 Y[] N[]
- 8.4.1.2.07 Compliance
- Multiplier = 4 5.1 c1 Y[] N[]
-
- c1:IF implementing a fuzzball using a main system clock
- THEN m ELSE o.
-
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- Gowin [Page 9]
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- RFC 1708 NTP PICS Proforma October 1994
-
-
- 8.4.2 PHASE ADJUSTMENT
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.4.2.01 Gradual Phase
- Adjustment 5.2 m Y[] N[]
- 8.4.2.02 Step Phase Adjustment 5.3 m Y[] N[]
-
- 8.5 NTP DATA FORMAT
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.5.01 Leap Indicator
- is a 2 bit code App. A m Y[] N[]
- 8.5.02 Version Number
- is a 3 bit integer App. A m Y[] N[]
- 8.5.03 Mode
- is a 3 bit integer App. A m Y[] N[]
- 8.5.04 Stratum is an 8
- bit integer App. A m Y[] N[]
- 8.5.05 Poll is an 8 bit
- signed integer App. A m Y[] N[]
- 8.5.06 Precision is an
- 8 bit signed integer App. A m Y[] N[]
- 8.5.07 Root Delay is a 32 bit signed
- fixed-point number App. A m Y[] N[]
- 8.5.08 Root Dispersion is a 32 bit
- fixed-point number App. A m Y[] N[]
- 8.5.09 Reference Identifier is a 4
- octet, left justified, zero
- padded ASCII string App. A m Y[] N[]
- 8.5.10 Reference Timestamp is a 64
- bit timestamp format App. A m Y[] N[]
- 8.5.11 Originate Timestamp is a 64
- bit timestamp format App. A m Y[] N[]
- 8.5.12 Receive Timestamp is a 64
- bit timestamp format App. A m Y[] N[]
- 8.5.13 Transmit Timestamp is a 64
- bit timestamp format App. A m Y[] N[]
- 8.5.14 Authenticator 96 bits App. A o Y[] N[]
-
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- Gowin [Page 10]
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- RFC 1708 NTP PICS Proforma October 1994
-
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- 8.6 NTP Control Messages
-
- 8.6.1 NTP Control Message Header Format
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.1.01 Leap Indicator
- is a 2 bit code App. B.1 c1 Y[] N[]
- 8.6.1.02 Version Number
- is a 3 bit integer App. B.1 c1 Y[] N[]
- 8.6.1.03 Mode is a 3 bit
- integer App. B.1 c1 Y[] N[]
- 8.6.1.04 Response bit is
- a 1 Bit field App. B.1 c1 Y[] N[]
- 8.6.1.05 Error bit is a 1
- bit field App. B.1 c1 Y[] N[]
- 8.6.1.06 More bit is a 1
- bit field App. B.1 c1 Y[] N[]
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.1.07 Operation Code
- is a 5 bit integer App. B.1 c1 Y[] N[]
- 8.6.1.08 Sequence is a 16
- bit integer App. B.1 c1 Y[] N[]
- 8.6.1.09 Status is a 16
- bit code App. B.1 c1 Y[] N[]
- 8.6.1.10 Association ID
- is a 16 bit integer App. B.1 c1 Y[] N[]
- 8.6.1.11 Offset is a 16
- bit integer App. B.1 c1 Y[] N[]
- 8.6.1.12 Count is a 16
- bit integer App. B.1 c1 Y[] N[]
- 8.6.1.13 Data is a
- maximum of 468 octets App. B.1 c1 Y[] N[]
- 8.6.1.14 Authenticator
- 96 bits App. B.1 c1 Y[] N[]
-
- c1: IF control messages are used THEN m ELSE o.
-
-
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- Gowin [Page 11]
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- RFC 1708 NTP PICS Proforma October 1994
-
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- 8.6.1.1 NTP Control Message Required Values
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.1.1.01 Leap Indicator = 00 App. B.1 c1 Y[] N[]
- 8.6.1.1.02 Version Number = 3 App. B.1 c1 Y[] N[]
- 8.6.1.1.03 Mode = 6 App. B.1 c1 Y[] N[]
-
- c1:IF control messages are used THEN m ELSE o.
-
- 8.6.2 System Words
-
- 8.6.2.1 System Status Word
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.2.1.01 Leap Indicator
- is a 2 bit code App.B.2.1 c1 Y[] N[]
- 8.6.2.1.02 Clock Source is
- a 6 bit integer App.B.2.1 c1 Y[] N[]
- 8.6.2.1.03 System Event Counter
- is a 4 bit integer App.B.2.1 c1 Y[] N[]
- 8.6.2.1.04 System Event Code
- is a 4 bit integer App.B.2.1 c1 Y[] N[]
-
- c1:IF control messages are used THEN m ELSE o.
-
- 8.6.2.2 Peer Status Word
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.2.2.01 Peer Status is a
- 5 bit code App.B.2.2 c1 Y[] N[]
- 8.6.2.2.02 Peer Selection
- is a 3 bitinteger App.B.2.2 c1 Y[] N[]
- 8.6.2.2.03 Peer Event Counter
- is a 4 bit integer App.B.2.2 c1 Y[] N[]
- 8.6.2.2.04 Peer Event Code
- is a 4 bit integer App.B.2.2 c1 Y[] N[]
-
- c1:IF control messages are used THEN m ELSE o.
-
-
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- RFC 1708 NTP PICS Proforma October 1994
-
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- 8.6.2.3 Clock Status Word
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.2.3.01 Clock Status is
- an 8 bit integer App.B.2.3 c1 Y[] N[]
- 8.6.2.3.02 Clock Event Code
- is an 8 bit integer App.B.2.3 c1 Y[] N[]
-
- c1:IF control messages are used THEN m ELSE o.
-
- 8.6.2.4 Error Status Word
-
- Item No. NTP Requirements Reference Status Support
- =================================================================
- 8.6.2.4.01 Error Status is
- an 8 bit integer App.B.2.4 c1 Y[] N[]
-
- c1:IF control messages are used THEN m ELSE o.
-
- 9. Security Considerations
-
- Security issues are not discussed in this memo
-
- 10. References
-
- [1] Mills. D., "Network Time Protocol Version 3 - Specification,
- Implementation and Analysis", RFC 1305, UDEL, March 1992.
-
- 11. Author's Address
-
- Dan R. Gowin
- Vitro a Tracor Company
- 5001 N. St. Rd. 37 (BUS)
- Bloomington, IN 47404-1626
-
- Phone: (812) 336-2299 x379
- Fax: (812) 333-0415
- EMail: drg508@crane-ns.nwscc.sea06.navy.MIL
-
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