IBM AIX 7.3 – Common Problem 012 – Diagnosis and Fix

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Workload Partition (WPAR) cannot reach gateway after global LPAR network change.

Environment & Reproduction

IBM AIX 7.3 LPAR exhibiting WPAR network isolation issues under standard PowerVM workloads.

lswpar -N
lsdev -Cc if

Root Cause Analysis

WPAR network attributes still reference old subnet after global LPAR migration.

Quick Triage

Confirm scope with errpt, recent changes, and subsystem state via lssrc.

lswpar -N mywpar
clogin mywpar netstat -in

Step-by-Step Diagnosis

Compare WPAR network config to global LPAR routing table.

lswpar -N mywpar
clogin mywpar netstat -rn

Solution – Primary Fix

Update WPAR network with chwpar to match new gateway.

chwpar -N address=10.1.1.10 netmask=255.255.255.0 -n mywpar

Solution – Alternative Approaches

Recreate the WPAR from mksysb if attributes are corrupt.

Verification & Acceptance Criteria

Confirm subsystem returns to RUNNING state and errpt shows no new entries.

lswpar mywpar
clogin mywpar ping gw

Rollback Plan

Restore prior configuration from mksysb or alt_disk_install clone if the fix regresses.

chwpar -N address=old_ip -n mywpar

Prevention & Hardening

Encode the fix in NIM customisation scripts and monitor via topas/nmon.

smit wpar  # template WPAR definitions

Related Errors & Cross-Refs

WPAR start failures; routing loops

Related tutorial: View the step-by-step tutorial for aix-7.3.

View all aix-7.3 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

IBM Workload Partitions for AIX