IBM AIX 7.2 – Common Problem 247 – 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

HMC shows the managed system or LPAR with status No Connection or Incomplete.

Environment & Reproduction

Hit after network change, certificate expiry, or HMC service processor reset.

Root Cause Analysis

RMC connections between HMC and AIX LPARs or FSP are blocked or stale.

Quick Triage

On the LPAR, run lssrc -a | grep rsct and rmcdomainstatus -s ctrmc to check RMC.

Step-by-Step Diagnosis

From HMC, run lssyscfg -r sys and ping the FSP from the HMC service network.

Solution – Primary Fix

Recycle RMC on AIX with /usr/sbin/rsct/bin/rmcctrl -z then -A to re-register.

Solution – Alternative Approaches

From HMC, run mksysconn -o auto and rebuild the manager connection.

Verification & Acceptance Criteria

HMC shows Operating status and DLPAR operations succeed on each LPAR.

Rollback Plan

Roll back firewall or HMC patches if connectivity regresses after a change.

Prevention & Hardening

Allow required TCP ports between HMC, FSP, and LPARs and monitor RMC daily.

Related Errors & Cross-Refs

Related to DLPAR failures, dynamic memory operations, and Live Partition Mobility.

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

IBM HMC and RSCT documentation for AIX 7.2 LPARs.