IBM eServer i5 Manual 

Also see for eserver i5: Handbook Cabling guide

Contents

iSeries. mySeries.Hardware Management ConsoleRedundant HMC configuration considerations Both HMCs can be used concurrently Both are fully active and accessible at all times Both enabling you to perform management tasks at any time SP provides a lock-mechanism to allow operations in a parallel environment When one HMC issues an order, the other HMC is temporarily “locked-out” There is no “primary” or “backup” designationBut ... Other definitions are locally stored and must be set up separately on each HMC User authorizations Network settings Service Settings HMC provides Service Focal Point and Service Agents functions Enable service on only one HMC to avoid duplicate service calls Perform software maintenance separately on each HMC Ensure HMC availability when updating code level Meanwhile, update other HMC code to same level as soon as possible Consider save/restore critical data to duplicate configuration information91iSeries. mySeries.Hardware Management ConsolePrivate indirect networkingService&SupportPrivate LANETH0 ETH1HMCHMC1 LAN1HMC2 LAN292