IBM AIX 7.2 – Common Problem 122 – 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 LPAR RMC state ‘Inactive’ and DLPAR operations fail.

Environment & Reproduction

AIX 7.2 LPAR with RSCT daemons stopped or firewall blocking 657/657.

Root Cause Analysis

ctrmc/ctcas daemons not running or routing to HMC broken.

Quick Triage

Run lssrc -a | grep ct and verify ctrmc, ctcas are active.

Step-by-Step Diagnosis

Use rmcctrl -p and lsrsrc IBM.ManagementServer to test peers.

Solution – Primary Fix

Re-enable RMC with rmcctrl -A and rmcctrl -p to bind to interfaces.

Solution – Alternative Approaches

Rebuild RSCT with /usr/sbin/rsct/install/bin/recfgct if state is corrupt.

Verification & Acceptance Criteria

HMC shows RMC Active and DLPAR memory/CPU operations succeed.

Rollback Plan

Revert rmcctrl changes with the previous config if regressions appear.

Prevention & Hardening

Document RMC ports/firewall rules and monitor with HMC alerts.

Related Errors & Cross-Refs

Pairs with ctrmc errors in /var/ct/IW/log entries.

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 Docs: RSCT, RMC, recfgct on AIX 7.2.