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Regression #16449

open

e1000 NICs can link at half-duplex

Added by Steve Wheeler 28 days ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Hardware / Drivers
Target version:
2.9.0
Start date:
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
25.11
Release Notes:
Default
Affected Version:
2.8.x
Affected Architecture:
amd64

Description

e1000 NICs, em(4) and igb(4), can link at half-duplex when connected to a fixed speed/duplex device. This appears to be due to this https://reviews.freebsd.org/D47336 that allowed NICs with fixed speed to still negotiate duplex. That has now been reverted upstream but 2.8.X was branched before that happened.

See: https://forum.netgate.com/topic/198807/issue-with-wan-speed-negotiation-after-upgrading-from-2.7-to-2.8-or-2.8.1

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