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Important Considerations for STP server role assignments



Document Author:
Additional Author(s):

Gregory Hutchison
Noshir Dhondy


Document ID:

WP101833


Doc. Organization:

Advanced Technical Sales


Document Revised:

12/14/2011


Product(s) covered:

# 2084; # 2086; # 2094; # 2096; # 2097; # 2098; IBM eServer zSeries; z9 BC; z9 EC; z10; z10 BC; z10 EC; z114; z196; zEnterprise; zEnterprise 196; zSeries 890; zSeries 990; zSeries







Abstract: The recommendations in this White Paper apply only if you have configured a Server Time Protocol (STP) Coordinated Timing Network (CTN) with three or more servers, and have assigned the roles listed below. Recommendations for reassigning STP server roles when any of the assigned role servers has a planned or unplanned outage are documented.

The recommendations, if not followed, MAY result in all the servers in the CTN becoming unsynchronized, a condition that results in a sysplex wide outage.

NOTE! Some aspects of this information is outdated. You must also review white paper WP102037,
http://www.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/WP102037


STP Triad - Coordinated Timing Networks - updated December 14 2011.pdfSTP Triad - Coordinated Timing Networks - updated December 14 2011.pdf
STP Triad - Coordinated Timing Networks - updated December 14, 2011.pdf

STP Triad - Coordinated Timing Networks - updated December 14 2011.docSTP Triad - Coordinated Timing Networks - updated December 14 2011.doc
STP Triad - Coordinated Timing Networks - updated December 14, 2011.doc



Classification:

Hardware

Category:

Installation and Migration




Platform(s):

IBM System z Family

S/W Pillar(s):

IBM System z Software

O/S:

z/OS

Keywords:

Server Time Protocol

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