Enhancing the Network Manager could enable it to record each link flipping event, thereby indicating whether such occurrences were attributable to internal components or external factors. 

• 1. 1. Example*

When executing "nmcli networking off," the ethtool status for the interface shows "Link detection: no," indicating a Layer 1 problem. However, this is not actually the case.

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1. ethtool enp1s0

Settings for enp1s0:
       Supported ports: [  ]
       Supported link modes:   Not reported
       Supported pause frame use: No
       Supports auto-negotiation: No
       Supported FEC modes: Not reported
       Advertised link modes:  Not reported
       Advertised pause frame use: No
       Advertised auto-negotiation: No
       Advertised FEC modes: Not reported
       Speed: Unknown!
       Duplex: Unknown! (255)
       Auto-negotiation: off
       Port: Other
       PHYAD: 0
       Transceiver: internal
       Link detected:  no <----------

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• From the logs, we also could not understand why the ethtool "Link detected: no". There is confusion in the logs making it hard to understand. 

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Jul 16 08:49:12 rhel9 NetworkManager[729]: <info>  [1752635952.0054] dhcp4 (enp1s0): state changed new lease, address=192.168.122.214
Jul 16 08:49:12 rhel9 systemd[1]: Starting Network Manager Script Dispatcher Service...
Jul 16 08:49:12 rhel9 systemd[1]: Started Network Manager Script Dispatcher Service.
Jul 16 08:49:22 rhel9 systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2229] manager: disable requested (sleeping: no  enabled: yes)
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2230] device (enp7s0): state change: disconnected -> unmanaged (reason 'unmanaged-sleeping', managed-type: 'full')
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2236] manager: NetworkManager state is now ASLEEP
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2237] audit: op="networking-control" arg="off" pid=13409 uid=0 result="success"
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2237] device (lo): state change: activated -> deactivating (reason 'sleeping', managed-type: 'external')
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2241] device (enp1s0): state change: activated -> deactivating (reason 'sleeping', managed-type: 'full')
Jul 16 08:59:32 rhel9 systemd[1]: Starting Network Manager Script Dispatcher Service...
Jul 16 08:59:32 rhel9 systemd[1]: Started Network Manager Script Dispatcher Service.
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2415] device (lo): state change: deactivating -> disconnected (reason 'sleeping', managed-type: 'external')
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2425] device (enp1s0): state change: deactivating -> disconnected (reason 'sleeping', managed-type: 'full')
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2430] dhcp4 (enp1s0): canceled DHCP transaction
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2430] dhcp4 (enp1s0): activation: beginning transaction (timeout in 45 seconds)
Jul 16 08:59:32 rhel9 NetworkManager[729]: <info>  [1752636572.2431] dhcp4 (enp1s0): state changed no lease
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