Hey guys I am having some problems with Lab 5 and doing switch-to-switch Q-in-Q 
tunneling. This is the configuration I have so far on the client switch;

switchport trunk encapsulation dot1q
switchport mode trunk 
switchport trunk native vlan 990
switchport trunk allowed vlan 990


And here is the configuration on the service provider switch;


switchport access vlan 990
switchport mode dot1q-tunnel
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
no cdp enable

I am continuously getting the l2protocol tunnel errors which place my interface 
into errdisable. Is there anything I'm missing to the configuration? Also in 
the Detailed Solution guide the configuration of the client switches is not 
even included. I looked it up in the Doc CD on cisco.com and there is nothing 
on this error I am getting. Also in detailed solution guide it said to prune 
vlan 12 from the trunk links. But when I do that it doesn't even do anything. 
I'm still trying to understand why I would prune vlan 12 when it doesn't have 
anything to do with my configuration. Thanks in advance for your help.
                                          
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