🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: IBM AIX 7.2

📖 ~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

LPM validation fails citing missing VIOS resources or RMC channel.

Environment & Reproduction

IBM AIX 7.2 LPAR exhibiting PowerVM Live Partition Mobility (LPM) failure issues under standard PowerVM workloads.

lssyscfg -r lpar -m frame1
rmcdomainstatus -s ctrmc

Root Cause Analysis

RMC firewall or VIOS storage mapping mismatch blocks LPM.

Quick Triage

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

errpt | grep RMC
lsmap -all

Step-by-Step Diagnosis

Run lpar_netboot validation and inspect HMC migration log.

migrlpar -o v -m frame1 -t frame2 -p lpar1
lsmap -all
Illustrative mockup for aix-7.2 — aix72-b01-p013-diag
Diagnosis console for PowerVM Live Partition Mobility (LPM) failure on IBM AIX 7.2 — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Re-establish RMC and align VIOS LUN visibility on target.

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rmcctrl -z
rmcctrl -A
migrlpar -o m -m frame1 -t frame2 -p lpar1
Illustrative mockup for aix-7.2 — aix72-b01-p013-fix
Remediation output for PowerVM Live Partition Mobility (LPM) failure on IBM AIX 7.2 — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Use Suspend/Resume or shutdown-cold migration if RMC remains down.

Verification & Acceptance Criteria

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

lparstat -i | grep -i migr
rmcdomainstatus -s ctrmc

Rollback Plan

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

migrlpar -o r -m frame2 -p lpar1  # recover partial migration

Prevention & Hardening

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

smit chinet  # whitelist RMC ports 657 in firewall

errpt LABEL=RMCD_EVENT; HMC mig event 1409

Related tutorial: View the step-by-step tutorial for aix-7.2.

View all aix-7.2 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

PowerVM Migration Guide

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