[c-nsp] QinQ and Bridging

Adam Vitkovsky Adam.Vitkovsky at gamma.co.uk
Tue Aug 11 04:18:04 EDT 2015

Hi Garry,

On the ASR1K I think you need to use the EFP type of config for the L2 bridging to work:
interface GigabitEthernet0/1
service instance 61400 ethernet
 encapsulation dot1Q 614 second-dot1q 201
 bridge-group 201


        Adam Vitkovsky
        IP Engineer

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-----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Garry
> Sent: 11 August 2015 05:01
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] QinQ and Bridging
> Hi,
> on a multi-site installation, I've got some additional requirements to
> implement. Currently, two site (CPE) have a tagged ethernet service to a
> central site (PE). Now, apart from the L3 traffic, I need to bridge an
> additional VLAN from site 2 to site 1 in order to provide a guest WLAN
> which is terminated through a firewall at site 1.
> Our PE currently is an ASR1000 series router, the CPEs are 1941 routers
> with Security IOS licenses and additional 4-port switching card.
> configuring the QinQ as such works fine, e.g. with CPE configure with this:
> |interface GigabitEthernet0/1.61400 encapsulation dot1Q 614 second-dot1q
> 201 ip address bridge-group 201|
> and PE with
> |interface GigabitEthernet0/1.61400 encapsulation dot1Q 614 second-dot1q
> 201 ip address bridge-group 201|
> doing a ping works fine, therefore I'd expect the actual QinQ stuff working.
> On the CPE, I have also configured (for testing purposes) one of the
> switch interfaces on each site router as "switchport access vlan201" ,
> then added the "int vlan 201" also into bridge-group 201. IRB is active,
> bridge-group 201 is set to protocol IEEE. On the PE I have configured
> the two QinQ subinterfaces also into the same bridge-group. Anyway, none
> of the broadcasts or other L2 stuff seems to be transported between the
> sites over the QinQ bridge broup.
> I assume I'm just missing some minor thing here, but after checking docs
> and examples, I'm sort of out of ideas ... none of the docs I found use
> the combination of QinQ and bridge groups, so I'm not even sure if this
> doesn't work by design ...
> Any hints or ideas appreciated ...
> -garry
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