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

[Patrick Coppinger]

check which other interfaces are in that Vlan with a "show vlan id XX" on 
the router. You might have an "access" port defaulting to trunk mode 
because of no switchport mode access

At 06:54 AM 8/25/2005 -0700, Ziti Bake wrote:
>I have a 6509/720 which is connected via trunk to
>metro ethernet provider (and thence to several
>end-offices).  I route each end-office at layer 3
>using one "int vlanXXX" for each office.  I've found
>that even if I unplug my trunk to the MAN, my "int
>vlanXXX" interfaces stay up.
>
>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.
>
>I had expected, that if the only L2 port for a vlan
>went down, then my L3 vlan interface would drop also.
>
>Is there a good way to have a L3 interface track the
>state of an L2 trunk?
>
>
>
>
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Patrick Coppinger
CCIE #14298
Senior Network Engineer
EarthLink, Inc.
(404) 748-7454 desk
(678) 592-7041 cell