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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D279195

            Bug ID: 279195
           Summary: kernel panic while re-configuring if_vlan(4) vlan id
           Product: Base System
           Version: 14.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: zlei@FreeBSD.org

Spot this while repeating
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D279181 .

Steps to repeat:

```
# ifconfig vlan0 create vlan 100 vlandev cxl0
# ifconfig vlan1 create vlan 110 vlandev cxl0
# ifconfig vlan0 vlan 110
ifconfig: SIOCSETVLAN: File exists
# ifconfig vlan0 vlan 110
# ifconfig vlan0 vlan 111

... panic ...
```

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