Powerpath: All paths to VPLEX show as asb:prox in mixed environment for non-distributed volume

Summary: Powerpath: All paths to VPLEX show as asb:prox in mixed environment for non-distributed volume

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

All the paths are place in asb:prox for a non-distributed volume.
eg:-
Pseudo name=emcpower8
VPLEX ID=CKM00AAAAAAAA
Logical device ID=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Standard UID=naa.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
type=Conventional;  state=alive; policy=ADaptive; queued-IOs=0
======================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
======================================================
   3 vmhba1                 C0:T0:L14  CL2-00    asb:prox alive      0      1
   2 vmhba2                 C0:T1:L14  CL2-03    asb:prox alive      0      0
   3 vmhba1                 C0:T2:L14  CL2-01    asb:prox alive      0      0
   2 vmhba2                 C0:T3:L14  CL2-02    asb:prox alive      0      1

Pseudo name=emcpower0
VPLEX ID=CKM00AAAAAAAA , CKM00BBBBBBBB
Logical device ID=yyyyyyyyyyyyyyyyyyyyyyyyyyyyy
Standard UID=naa.yyyyyyyyyyyyyyyyyyyyyyyyyyyyy
type=Conventional;  state=alive; policy=ADaptive; queued-IOs=0
======================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
======================================================
   1 vmhba4                 C0:T2:L0   CL2-03    asb:prox alive      0      0
   1 vmhba4                 C0:T3:L0   CL2-02    asb:prox alive      0      1
   4 vmhba3                 C0:T2:L0   CL2-01    asb:prox alive      0      0
   4 vmhba3                 C0:T1:L0   CL2-00    asb:prox alive      0      1
   1 vmhba4                 C0:T1:L0   CL1-03    active   alive      0      0
   4 vmhba3                 C0:T3:L0   CL1-00    active   alive      0      0
   4 vmhba3                 C0:T0:L0   CL1-01    active   alive      0      0
   1 vmhba4                 C0:T0:L0   CL1-02    active   alive      0      0

Cause

.

Resolution

PowerPath detects the most optimal paths (local paths) and places the remote paths in autostandby mode.

In mixed environments (VPLEX clusters with paths configured to cross-connected distributed volumes as well as paths configured to non-distributed volumes), the paths to the non-distributed volume inherit the cluster mode allocation that the proximity algorithm applies to its VPLEX cluster.
For example, the PowerPath proximity algorithm designates a VPLEX cluster as local and preferred for a crossconnected,
distributed volume on the host. After the distributed volume is designated as local, all paths to that cluster will be set as active.
In addition, even if there is a non-distributed volume in the cluster, paths to that non-distributed volume are also set as active. This setting is inherited from the global setting set on the VPLEX cluster.

In some scenario all paths to a volume are in asb:prox, then PowerPath/VE selects paths for I/O as if all paths are active.

Additional Information

The paths coming from CKM00BBBBBBBB are placed as Active, while paths coming from CKM00AAAAAAAA is placed in asb:prox for distributed volume.
In mixed environments (VPLEX clusters with paths configured to cross-connected distributed volumes as well as paths configured to non-distributed volumes), the paths to the non-distributed volume inherit the cluster mode allocation that the proximity algorithm applies to its VPLEX cluster
Hence the paths coming from non-mirrored volume which are from CKM00AAAAAAAA inherit the setting from distributed volume.
In the above situation, PowerPath/VE selects paths for I/O as if all paths are active for volume which are in asb:prox for non-mirrored volumes.

Affected Products

PowerPath

Products

PowerPath
Article Properties
Article Number: 000056877
Article Type: Solution
Last Modified: 17 Oct 2025
Version:  4
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