https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240825
Bug ID: 240825
Summary: Vlan interfaces does not work on lagg from em0, em1
Product: Base System
Version: 12.0-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: y...@shvets.name
Created attachment 207816
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=207816&action=edit
network configuration in rc.conf
After upgrading from 11.3-RELEASE-p3 to 12.0-RELEASE-p10 vlan-interfaces on
lagg0 (em0, em1) stopped working.
Vlan interfaces look like working but not working.
Network configuration is: em0 and em1 aggregated to lagg0. Based on lagg0
created vlan-interfaces.
On the other end is a cisco switch (port channel from two ethernet ports, the
mode is LACP).
The network configuration worked on 9.x-releng, 10.x-releng, 11.2-releng,
11.3-releng.
And does not work on 12.0-releng, 12-stable, 12.1-PRERELEASE.
The lagg0 interface works. But does not work vlans on lagg0.
Looks like that untagged ethernet frames passed from/to lagg0, but tagged
ethernet frames not passed.
After downgrading to 11.3-releng vlans on lagg0 works again.
Kernel of the system based on GENERIC, i.e "device vlan" is in the kernel
configuration.
See rc.conf, console.log in attachment.
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