000-221 · Question #48
A server on the 165.x.x.x subnet is displaying network problems. The administrator uses a console connection and gathers the following information: Which action will permanently resolve the issue?
The correct answer is D. Run 'chdev-I inet0-a delroute=net.-hopcount,0,,0.10.2.98.113'. On AIX, modifying the inet0 entry in the ODM (Object Data Manager) via chdev is the only way to make routing changes that survive a reboot. In-memory commands like 'route del' are lost when the system restarts.
Question
A server on the 165.x.x.x subnet is displaying network problems. The administrator uses a console connection and gathers the following information:
Which action will permanently resolve the issue?
Exhibit
Options
- AFlush the routing table.
- BRun 'route del 10.2.98.113-f.
- CModify/etc/routes and reboot the system.
- DRun 'chdev-I inet0-a delroute=net.-hopcount,0,,0.10.2.98.113'.
How the community answered
(28 responses)- A4% (1)
- B11% (3)
- C4% (1)
- D82% (23)
Why each option
On AIX, modifying the inet0 entry in the ODM (Object Data Manager) via chdev is the only way to make routing changes that survive a reboot. In-memory commands like 'route del' are lost when the system restarts.
Flushing the routing table affects only the in-memory kernel state and the problematic route is restored the next time networking initializes.
The 'route del' command removes the route from the active kernel routing table only and does not update the ODM, so the route reappears after a reboot.
AIX does not use /etc/routes for persistent route configuration; routing persistence is managed exclusively through the ODM, so editing that file has no effect.
The chdev -l inet0 command modifies the AIX ODM, which is the persistent configuration store used during system initialization. Specifying the delroute attribute removes the offending route from the ODM so it is never re-added at boot time, making this the only option that permanently eliminates a bad route entry.
Concept tested: Persistent AIX routing configuration via ODM and chdev
Source: https://www.ibm.com/docs/en/aix/7.3?topic=c-chdev-command
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