Frequently Asked Questions | Symmetricom S100 specification

Chapter 6

Frequently Asked Questions

Questions

How can we obtain NTP client software to use with the S100?

NTP client software information and configuration details are available from http://

www.ntp-systems.com

Client software and configuration information for Unix platforms can be downloaded from http://www.ntp.org.

SNTP client software is included with the S100 hardware.

What are the main differences between SNTP and NTP clients?

SNTP (Simple Network Time Protocol), based on RFC 1361/RFC 2030, gets its time from the specified time servers of the machine on which it is installed.

NTP, Network Time Protocol, is based on RFCs 1305 and 1119, and can be configured to obtain and distribute the time on the network. It has a built-in algorithm that calculates the time accurately up to 1-10 milliseconds. The algorithm can be configured to obtain time from an alternate source in case the original time server fails or gets out of synchronization.

Is there a way to get GPS time instead of UTC time from the S100?

The S100 normally provides UTC time. However, it can be configured to output GPS time— currently UTC + 13 seconds—by making several hardware changes to the unit. Contact your Symmetricom representative about this.

What outputs are available on the S100?

These are:

•Dual Ethernet 10/100BaseT (RJ 45)

•RS-232 Serial Console (DCE)

•Sysplex timer port

S100 User Guide – Rev. D – June 2005

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Symmetricom manual Frequently Asked Questions, How can we obtain NTP client software to use with the S100?

Contents

S100 User Guide S100 User Guide Rev. D June Table of Contents Chapter Web-Based Interface TCP/IP Chapter Operations & Time-Protocols Appendix a S100 Specifications 119 Appendix C Appendix E Antenna Replacement 141 Index 143 How to Go here for the answer Introduction and OverviewChapter Term Definition Conventions Used Product Details Time StandardsGlobal Positioning System GPS Stratum Levels Time Synchronization and BusinessStratum Level Significance How the S100 Solves the Problem National Measurement InstitutesCountry Name of NMI Abbreviation Special Safety Instructions Overview S100 TechnologyS100 Product Overview Sources of Time Web-based Access How the S100 Works Time Distribution Model S100 and NTP v4’s Security Features S100 and Time DistributionS100 and Client Software S100 and the Global Positioning System SyncServer S100 Getting Up and Running Installation and ConfigurationUnpacking Your S100 For the S100-Dial-up/ACTS For the S100-GPS For the S100-Dial-up/ACTS For the S100-GPS N c S e rv e r Your CD-ROM PuTTY Folder Details Using the Software PSFTP.EXE PUTTYGEN.EXE Primary Power Connection Installing Your S100Important Safety Instructions Rack Mounting Making All Connections An Overview On the S100 Front Panel Setting Up the Hardware Appendix E on On the S100 Rear Panel Installing the GPS Antenna Choosing an Antenna LocationOutdoors Installing the GPS antenna Connecting the Rubidium OptionEstablishing a Serial Connection 4Connecting the S100 5COM Port Properties Setting Up the IP Address 6Login and Command Line 9IPCONFIG and Ping Screen Testing Network Functionality Normal Turning Off Your S100 Logging On How to Acquire Time System Status Logged Administrator Log-In Next Step Configuration Wizard Choose Your Time Source Dial-up to NISTs Automated Computer Time Service Acts 17Configuring the S100 Time Source GPS Then click Next for the System Information dialog Test Results dialog System Tests Dialog Dialup Settings dialog Setup Complete dialog System Information dialog System Tests dialog Test Results dialog NTP 30System Information fields Click Test Now IRIG-B v.120,122,123 Configuring NTP Dialup Backup dialog 36System Testing options 37Test Results shown Installing SymmTime Using SymmTime SyncServer S100 To Synchronize SymmTime Next Use the Web-Based Interface SyncServer S100 Interface Screen Reference Web-Based Interface Logging Administrative Interface 2Administrative Interface Base Menu Admin Interface Base Menu 3Interface Admin Menu, expanded Administrative Menu Expanded System Status Timing Configuration NTP Relationships 5Configuring New Clients and Servers S100 User Guide Rev. D June NTP Dialup NTP Time Source Test NTP Status NTP Restart SyncServer S100 Advanced ntp.conf 10Viewing the NTP Configuration File 11Obtaining and Generating Keys Certificates Advanced Keys/Certificates Timing Engine Main Settings IRIG-A IRIG-B Timecode Settings GPS Information GPS HealthBit Position Meaning if bit value = 15GPS Signal Strength GPS Signal Strength GPS Position GPS Time Clock Settings Other InformationEngine Time 20Control Settings Control Settings Model Information Networking S100 User Guide Rev. D June Ping Ifconfig Output Options Traceroute Shutdown/Reboot Administration Restart Web Interface Admin Users Time Zone System Log Configuration Snmp Edit Snmp Configuration 33Setting Alarm Parameters Alarms NTP Log Logs System Log Boot Log Http Log Config Log SyncServer Help HelpNtpd Help Search Ntpd Manual 40Log Off screen Logging Off SyncServer S100 How the S100 Uses the Sysplex Timer Sysplex TimerOperations & Time-Protocols S100 Operations and Time Protocols 41Time Information String Parameters Daytime Protocol RFC Time Protocol RFC Simple Network Time Protocol RFC Network Time Protocol RFCNTP Data Format Mode Leap Indicator LIStratum Poll Precision Version Number VN Stratum ModePoll Interval Synchronizing Distance Root Distance Version Authentication NTP NTP Authentication Authentication NTP v4 Autokey Typical NTP Configuration ConsiderationsHow NTP Defines the Authentication Process Public Domain NTP Package Clients Other NTP Considerations Basic NTP Configuration S100 User Guide Rev. D June SyncServer S100 S100 User Guide Rev. D June 43Large Net NTP Configuration 44Large Net NTP Configuration 45Small Net NTP Configuration Acts Interface Dial-up PeersSecurity Acts Operation Snmp Simple Network Management Protocol Version 106 S100 User Guide Rev. D June Parameter Command Line Flag Snmp.conf token An authenticated and encrypted request example 108 S100 User Guide Rev. D June Questions Frequently Asked QuestionsHow can we obtain NTP client software to use with the S100? What are the main differences between Sntp and NTP clients? How do I check versions of the software in the S100? How does the S100 handle Leap Second? Cable length and Type Antenna How do I know if the satellite signal strength is good? Can the S100 utilize a certificate from an external CA? Does the S100 support NTP v4?How is the interface to the S100 secured? What security functions are provided with the S100? How-to’s and Tips How to install your S100 How to install NTP v4 on a Unix systemHow to get time using dial-up How to get time using GPS How to acquire and install SymmTime How to install your GPS antennaUse the quick How to guide How to change the root password How to get information about NTP SolutionsS100 does not respond to ping command S100 does not respond to NTP queries My S100 won’t track satellites Possible cause of tracking problems How to fix 118 S100 User Guide Rev. D June S100 Data Sheet Specifications S100 SpecificationsAppendix a Component Specifics Description Pin Descriptions Appendix B Time Glossary BCD CdmaCdsa Certificate Authority CA Content FilteringCertificate Extension Certificate Request Dcls DESDhcp SS/NTP DSADSS DTT GPS GMTHtml Http IKE IrigITU Ldap LANMD5 MIB NOC NistNtms NTP PCI OSIPkcs PKI RSA SHA-1Mime SSL SnmpSSL-LDAP TCP/IP TLS TftpTMC TPC TSP TSATSR UDP/IP VPN UTCW3C WAN 509 v3 Certificate Extension Appendix D Customer AssistanceUS Assistance Center Emea Assistance Center Emeasupport@symmetricom.com Appendix C Declaration of ConformitySymmetricom, Inc Westwind Blvd Santa Rosa, Ca USA Conforms to the Following European Union Directives FCC Appendix E Antenna Replacement 142 S100 User Guide Rev. D June Numerics Index 144 S100 User Guide Rev. D June S100 User Guide Rev. D June 145 Denial of Service DES S100 User Guide Rev. D June 147 Https Irig a 150 S100 User Guide Rev. D June S100 User Guide Rev. D June 151 152 S100 User Guide Rev. D June S100 User Guide Rev. D June 153 154 S100 User Guide Rev. D June S100 User Guide Rev. D June 155 Vault Verification Version Virus VPN W3C Wait time WAN 509 v3 Certificate Extension Coordinate Year 158 S100 User Guide Rev. D June