IBM I5/OS - Manual (Page 46)

i Series. my Series.
Hardware Management Console
Redundant 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” designation
But ...
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 information
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i Series. my Series.
Hardware Management Console
Private indirect networking
Service
&
Support
Private LAN
ETH0 ETH1
HMC
HMC1 LAN1 HMC2 LAN2
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