dot1q tunneling with COS

Hi guys

Busy configuring a dot1Q tunnel from one task and the task asks that tunnel
frame should have a COS of 3.

The solution is the following:
interface FastEthernet0/4
 switchport access vlan 123
 switchport mode dot1q-tunnel
  l2protocol-tunnel cdp
* l2protocol-tunnel cos 3 *
 no cdp enable
end
I do not have that as a option of any of my switches nor the rack that I'm
renting.

   * l2protocol-tunnel cos 3 *

The IOS versions I tried this on is :
 C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(44)SE3, RELEASE
SOFTWARE (fc2)
 C3560 Software (C3560-ADVIPSERVICESK9-M), Version 12.2(46)SE, RELEASE
SOFTWARE (fc2)
 C3560 Software (C3560-ADVIPSERVICESK9-M), Version 12.2(25)SEE4, RELEASE
SOFTWARE (fc1)
Enabling mls qos, or changing the sdm profile does not seem the make any
difference.

Any Ideas on what im missing?

Regards

-- 
<ruhann>
Blogs and organic groups at http://www.ccie.net