[RHEL-80778] [RFE] Add support in NetworkManager for configuring the NIC FEC encoding natively [rhel-9.5.z] - Red Hat Issue Tracker

Acceptance Criteria:

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Definition of Done:

Please mark each item below with ( / ) if completed or ( x ) if incomplete:

( ) The acceptance criteria defined below are met.

None

( ) Code changes are included in a downstream build attached to an errata.

( ) All required testing (manual and/or automated) passes successfully.

( ) Related documentation updates (if applicable) have been completed.

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Definition of Done: Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) The acceptance criteria defined below are met. None ( ) Code changes are included in a downstream build attached to an errata. ( ) All required testing (manual and/or automated) passes successfully. ( ) Related documentation updates (if applicable) have been completed.
Git Pull Request:
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1895
Preliminary Testing:
Requested
Errata Link:
https://errata.engineering.redhat.com/advisory/147731
Test Coverage:
None

This is a clone of issue RHEL-24055 to use for version rhel-9.5.z
–
Original description:

As a system admin, I want to be able to configure the FEC encoding options using nmcli, so that there's no need to create a separate NetworkManager dispatcher script.

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

Configure the FEC settings via nmcli. For example:
```
# nmcli con mod CON_NAME ethtool.fec-mode off
```

Bring the interface down/up to apply the ethtool FEC encoding setting:
- ```
# nmcli con down CON_NAME
```

Use `ethtool` to confirm that FEC encoding has been turned off on the underlying device:
```
ethtool --show-fec DEV_NAME
```

clones

RHEL-24055 [RFE] Add support in NetworkManager for configuring the NIC FEC encoding natively

links to

RHBA-2025:147731 NetworkManager bug fix and enhancement update