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Status Delivered
Created by Guest
Created on Oct 11, 2018

SVC is not aware of AIX LPM-capable secondary WWPNs, causing all AIX LPM-capable LPARs always seen as Degraded

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
  • Guest
    Reply
    |
    Jun 18, 2020

    Delivered in 8.3.0

  • Guest
    Reply
    |
    Nov 6, 2018

    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.

0 MERGED

SVC - correct host status for LPM enabled LPARs

Merged
Introduce a host type specific to AIX/LPM hosts where we only expect 50% of ports to be active.
over 8 years ago in IBM Spectrum Virtualize / FlashSystem 1 Delivered
0 MERGED

SVC/Storwize + LPM Degraded

Merged
SVC code should allow paired WWPNs so that properly configured IBM POWER LPM LPARs will not show degraded. This cannot just be "all odds, or all evens", because an LPAR could move, then replace or add a virtual adapter, and it would have a mix of ...
almost 6 years ago in IBM Spectrum Virtualize / FlashSystem 1 Delivered