Print | Rate this content

HP ProCurve Switches -- Differences Between TimeP and SNTP

AskProCurve Article

Title:

HP ProCurve Switches -- Differences Between TimeP and SNTP

Available Part Numbers:

J4110A HP ProCurve Switch 8000M,J4121A HP ProCurve Switch 4000M,J4812A HP ProCurve 2512 Switch,J4813A HP ProCurve 2524 Switch,J4819A HP ProCurve 5308XL Switch,J4848A HP ProCurve Switch 5372xl,J4848B HP ProCurve 5372XL Switch,J4849A HP ProCurve Switch 5348xl,J4849B HP ProCurve 5348XL Switch,J4850A HP ProCurve 5304XL Switch,J4861A HP ProCurve Switch 4108GL Bundle,J4865A HP ProCurve 4108GL Switch,J4887A HP ProCurve 4104GL Switch,J4888A HP ProCurve 4148gl Switch,J4899A HP ProCurve Switch 2650,J4899B HP ProCurve 2650 Switch,J4899C ProCurve Switch 2650,J4900A HP ProCurve Switch 2626,J4900B HP ProCurve 2626 Switch,J4900C ProCurve Switch 2626,J4901A ProCurve Switch 2524 Limited Edition,J4903A HP ProCurve Switch 2824,J4904A HP ProCurve Switch 2848,J4905A HP ProCurve Switch 3400cl-24G,J4906A HP ProCurve Switch 3400cl-48G,J8151A HP ProCurve 4140GL Switch,J8152A HP ProCurve 4160gl Switch,J8164A HP ProCurve Switch 2626 Pwr,J8165A HP ProCurve Switch 2650 Pwr,J8166A HP ProCurve 5304xl 32G Switch,J8167A HP ProCurve 5308xl-48G Switch,J8692A ProCurve Switch 3500 yl 24G PWR Intel Ed,J8693A ProCurve Switch 3500 yl 48G PWR Intel Ed,J8697A ProCurve Switch 5406 zl Intelligent Edge,J8698A ProCurve Switch 5412zl Intelligent Edge,J8699A ProCurve Switch 5406 zl 48G Intell Edge,J8700A ProCurve Switch 5412zl-96G Intell Edge,J8762A ProCurve Switch 2600-8PWR w/Gig Uplink,J8770A ProCurve Switch 4204 vl,J8772A ProCurve Switch 4202 vl-72,J8773A ProCurve Switch 4208vl,J8775A ProCurve Switch 4208 vl-96,J9019A ProCurve Switch 2510-24,J9019B ProCurve Switch 2510-24,J9020A ProCurve Switch 2510-48,J9021A ProCurve Switch 2810-24 G,J9022A ProCurve Switch 2810-48 G,J9030A ProCurve Switch 4208vl-72GS,J9049A ProCurve Switch 2900- 24G,J9050A ProCurve Switch 2900 48G,J9064A ProCurve Switch 4204vl-48GS,J9085A ProCurve Switch 2610-24,J9086A ProCurve Switch 2610-24/12PWR,J9087A ProCurve Switch 2610-24-PWR,J9088A ProCurve Switch 2610-48,J9089A ProCurve Switch 2610-48-PWR,J9137A HP ProCurve 2520-8-PoE Switch,J9138A HP ProCurve 2520-24-PoE Switch,J9145A HP ProCurve 2910al-24G Switch,J9146A HP ProCurve 2910al-24G-PoE+ Switch,J9147A HP ProCurve 2910al-48G Switch,J9148A HP ProCurve 2910al-48G-PoE+ Switch,J9279A ProCurve Switch 2510G-24,J9280A ProCurve Switch 2510G-48,J9298A HP ProCurve 2520G-8-PoE Switch,J9299A HP ProCurve 2520G-24-PoE Switch,J9447A HP ProCurve 5406zl-48G-PoE+ Switch,J9448A HP ProCurve 5412zl-96G-PoE+ Switch,J9470A HP ProCurve 3500-24 Switch,J9471A HP ProCurve 3500-24-PoE Switch,J9472A HP ProCurve 3500-48 Switch,J9473A HP ProCurve 3500-48-PoE Switch

Issue Description:

What are the differences between TimeP and SNTP?

Solution:

TimeP, or “Time Protocol”, is defined in RFC 868. The RFC reads, “This protocol provides a site-independent, machine readable date and time. The Time service sends back to the originating source the time in seconds since midnight on January first 1900.” Also: “…The use of time-servers makes it possible to quickly confirm or correct a system's idea of the time, by making a brief poll of several independent sites on the network.” RFC 868 was first defined in May, 1983.

SNTP is a newer time protocol, first published in 1996. It is defined in RFC 2030, built upon earlier Time Protocols, and is desirable due to the widespread availability of server software packages.

Either protocol may be configured to poll a specific network server for time information, or may be configured to poll recognized clocks such as those kept by the US Naval Observatory Master Clocks in Washington DC; or Colorado Springs, Colorado.

To view RFC documentation, please visit the IETF homepage at http://www.ietf.org Non-HP site

Modified Date:

2010-02-01

Provide feedback

Please rate the information on this page to help us improve our content. Thank you!