https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224961
Bug ID: 224961
Summary: VLAN ID 0 Not Supported
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Creating a virtual interface with the VLAN ID set to 0 (e.g., em0.0, em1.0,
etc.) is not supported by FreeBSD's vlan implementation. The issue is that
IEEE 802.1Q specifies that VLAN 0 is "reserved." FreeBSD honors this
reservation because the implementation is standards compliant. However, in
some instances it would be able to create interfaces on VLAN 0 (e.g., when
wanting to use FreeBSD for a "reserved" purpose).
I understand that standards compliance is the good default design here.
However, it would be great if there were a sysctl flag that could be set to
allow interfaces on VLAN0. The default value could be for standards compliant
behavior, thereby allowing users to enable VLAN 0 if desired and they know what
they are doing.
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