Problem getting QinQ and EoMPLS to work

Unanswered Question
Feb 7th, 2007


we're trying to setup 802.1Q in 802.1Q using MPLS to traverse a MPLS network. However we haven't been able to get the VC for the EoMPLS to come up.

We're trying to do this on Cisco 6509-E (Sup720) switches running native IOS 12.2(18)SXF5

Our network looks like this;

Edge Switch -vlan trunk-> MPLS1 --> MPLS2 --> MPLS3 --> MPLS4 -vlan trunk-> Edge Switch

The EoMPLS tunnel we're trying to setup is between MPLS1 and MPLS4. The mpls l2transport command is set on the interface "vlan152".

Attached are the following configurations/show commands from both MPLS1 and MPLS4;

show interface vlan 152 (mpls l2transport interface),

show interface gigx/x (QinQ tunnel interface),

show mpls l2transport vc detail,

show ip cef,

show mpls ldp neighbor,

show mpls forwarding-table,

show ip route.

In the show mpls l2transport vc detail, it says "Tunnel label: not ready" and "Output interface unknown". I haven't been able to figure out what is causing this but it might be the cause of the problem (missing/wrong configuration?)

Any help you can give me would be most appreciated.

kind regards


I have this problem too.
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mheusinger Wed, 02/07/2007 - 07:18


can you check LSP end-to-end? Which mpls enabled interfaces are you using to transport EoMPLS?

Also you might use "ping mpls pseudowire" on both ends and post the output.

Regards, Martin

alexander.muhin Wed, 02/07/2007 - 09:06

Hi Michel,

AFAIK, cisco 7600 in PFC3B/3BXL mode doesn't support EoMPLS on Layer 3 vlan interfaces.

Try to configure xconnect under interface GigabitEthernet7/6.



pucko Thu, 02/08/2007 - 22:45


Is that feature even supported on a 6k without OSM/SIP modules ?

I have done the exact same but with 3750me and it worked just fine, be aware of potential MTU problems.


6mpedersen Thu, 02/08/2007 - 22:50

Thanks to everyone for replying. It seems that it might not be supported on the 6500 without OSM/SIP modules.

MTU wise, we're okay as the entire MPLS core has a max MTU of 9216.

Since this feature doesn't seem to be supported, we'll try to find a different way to achieve what we're trying to do, getting our layer 2 vlans from point A to point B. I'll look into using sub-interfaces and see if that won't solve the problem.

kind regards



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