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SVC is currently not capable of differentiating between primary/active and secondary/passive WWPNs of AIX LPM-capable LPARs, causing host objects always to be seen as Degraded.
Every virtual fcs adapter of an LPAR has 2 WWPNs, of which one is online and used for data transfers, whilst 2nd is offline, and activated during LPM procedure.
For non-LPM hosts this is not an issue, as administrator can choose to work with primary/active WWPNs only - and therefore, during normal operation, hosts are seen as Online.
For LPM-capable hosts however, all (primary and secondary) WWPNs must be taken into account, causing half of the ports assigned to host in SVC to be always offline - which disables administrator to easily differentiate between healthy an degraded hosts - as all of them are seen as degraded.
I propose to implement special flag to certain host ports (WWPNs) marking them as "expected to be offline/failover port", whose status would not be taken into account when evaluating Host status (Online/Degraded/Offline).
Second approach would be to have ability to create/define WWPN pairs, and evaluate port status as "Offline" only if both WWPNs from pair will go offline.
WWPN primary/secondary pair recognition should be quite straightforward - if administrator did not manually assign them for virtual fcs adapter, their auto-generated address is always "secondary wwpn = primary wwpn +1", for example:
primary/active: C05076084B940018
secondary/passive: C05076084B940019
Idea priority | Medium |
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Delivered in 8.3.0
same problem with Hyper-V vSAN enabled VM, each VM have 2 WWN (one active and one not-active), which switched when vm migrate between Hyper-V cluster. Now all vSAN enabled VM (host at SVC level) appared as degraded, and showed as "error" at summary screen.