[c-nsp] trunk is down, but int vlan stays up

[lists at hojmark.org]

> There are no access ports using these vlans, and all trunk
> ports have vlans explicitly listed with "allowed vlan".  The
> only trunk allowing the metro ethernet VLAN range is the trunk
> to the MAN itself.

Try 'sh spann vl X' to see which interface(s) has the VLAN in
STP forwarding.

-A