HP BladeSystem c-Class Onboard Administrator Failover

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Understanding the Active-Standby Transition Process

Technical white paper

Table of contents

Purpose of this White Paper ........................................................................................................... 2

OA Failover Process Description ..................................................................................................... 2

OA Failover Testing – General Discussion ....................................................................................... 2

OA Failover Testing - Recommendations .......................................................................................... 4

Validate status and allow appropriate recovery time ..................................................................... 4

Summary of content (5 pages)

PAGE 1
HP BladeSystem c-Class Onboard Administrator Failover Understanding the Active-Standby Transition Process Technical white paper Table of contents Purpose of this White Paper ...........................................................................................................2 OA Failover Process Description .....................................................................................................2 OA Failover Testing – General Discussion ....................................................
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Purpose of this White Paper HP c-Class BladeSystem Onboard Administrators (OA) are frequently configured in pairs to provide fault tolerance of the enclosure management. This white paper describes the interaction of the Active and Standby OAs when configured in fault tolerant pairs, and how they behave during failover events.
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In addition, if the enclosure is configured with Virtual Connect (VC), there is additional recovery process that VC needs to perform after the OA failover. The following sections discuss the OA – VC recovery interactions in further details. When an OA failover occurs, there is a period of time where Virtual Connect Manager (VCM) is not able to communicate with the OA. It is strongly advised not to perform any VCM maintenance tasks during OA failover testing.
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OA Failover Testing - Recommendations Validate status and allow appropriate recovery time In order to obtain valid results for repeated, back-to-back OA failover testing, wait at least 7 minutes before initiating each OA "force failover" command. In addition, if the enclosure is configured for Virtual Connect, validate the state of VCM prior to initiating each forced OA failover. It is very important to check the status of the VCM prior to initiating any subsequent failover operations.
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© Copyright 2011 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. c02994572 Second Edition July 2013.