[c-nsp] ASR901 - L2 tunneling

[Pshem Kowalczyk]

Hi George,

Are you able to share the configuration you used to achieve point '4':

'L2protocol forwarding for both tagged and untagged PDUs is supported
with port-based EoMPLS'

I currently have a setup like this:

interface GigabitEthernet0/4
 mtu 9000
 no ip address
 negotiation auto
 l2proto-forward tagged
 no keepalive
 xconnect 10.122.129.254 4545 encapsulation mpls
  mtu 9000

(also tried without l2proto-forward tagged) and it doesn't forward
most of the l2frames (I got pgap and few other ones to get through,
but no STP or MSTP).

kind regards
Pshem


On 27 August 2013 01:44, George Giannousopoulos <ggiannou at gmail.com> wrote:
> Hi Psem,
>
> We also did some tests with the ASR901 and we had issues with l2protocol
> forwarding
> After some research with cisco, we concluded that
>
> - L2protocol tunnelling is not supported and there is no plan to support it
> - L2protocol forwarding is supported on EFPs only for untagged PDUs
> - L2protocol forwarding for tagged PDUs is only supported locally on BD
> - L2protocol forwarding for both tagged and untagged PDUs is supported with
> port-based EoMPLS
>
> George
>
>
> On Mon, Aug 26, 2013 at 3:24 AM, Pshem Kowalczyk <pshem.k at gmail.com> wrote:
>>
>> Hi,
>>
>> I'm trying to asses if we could use asr901 for our usual metro-E
>> deployments (where we currently use ME3600x). L3 on the ASR901 seems
>> to work well enough, but with L2 I've encountered some issues,
>> especially around L2 tunneling.
>> I've already managed to confirm with Cisco, that some of the
>> functionality is not there yet, but determining what actually works
>> proven to be more difficult. So I'm looking for any input regarding
>> the subject.
>>
>> I've tried to set up a simple dot1q to dot1q (both ends ASR901) xconnect:
>>
>> interface GigabitEthernet0/4
>>  description tester (slave)
>>  no ip address
>>  negotiation auto
>>  l2proto-forward tagged
>>  service-policy output PM-CUST-DEFAULT-10M-OUT
>>  service instance 1 ethernet
>>   encapsulation dot1q 17
>>   xconnect 10.122.129.254 4545 encapsulation mpls
>>    mtu 9000
>>
>> (and identical setup on the other device)
>> The xconnect comes up fine and forwards standard ethernet frames no
>> issues. I can't get any of the L2 (STP, LLDP) stuff to work though.
>> The frames simply don't leave the box (I don't think there is a way to
>> do port-mirror on ASR901, so I have to capture the frames on the next
>> device).
>>
>> I've got confirmation from Cisco that this wouldn't work with
>> encapsulation 'default', but I hoped to get it going with explicit
>> tag, especially with the ' l2proto-forward tagged' command. But
>> documentation is scarce.
>> Has anyone managed to configure this and get it working?
>>
>> kind regards
>> Pshem
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>