[AusNOG] Fwd: Mikrotik > Telstra DA MRV Issue

[Mark Smith]

On 10 August 2017 at 09:21, Cameron Murray <cameron.murray at gmail.com> wrote:
> Guys,
>
> Been fighting a weird issue for the past week with a AAPT resold Telstra
> Wholesale DA service.
>
> The service was completed last week and successfully tests by both carriers
> however with the customers Mikrotik device the service does not function
> correctly with only RX data within a tagged vlan 1024 (This is an untagged
> service and the AGG vlan is not 1024).
>

Sounds like the service is not VLAN tag transparent. What does the
service spec say about supported Ethernet frame types?


> When we perform a data capture from within the Mikrotik we can see ARP and
> ECHO responses being performed from the CPE to the AGG Router that are being
> sent out untagged.
>
> The show stopper here is if we plug a laptop directly into the MRV the
> service works correctly.
>

I don't know if you're able to do it on Windows; under Linux it is
easy to add a VLAN tag to create a new subinterface with 'vconfig'.

Give that a try and if that fails, that isolates the issue to the
service not the Mikrotik routers.


> We have changed Mikrotik Routers and also tried different series devices,
> interface speeds and different MAC address ranges. We've provisioned
> hundreds of these and this is the first that I'm stumped on.
>
> This is a difficult issue to explain and even harder when both AAPT and
> Telstra saying no fault found.
>
> Reference Images:
>
> https://www.dropbox.com/s/nzwi7kad24cpims/ARP%20Request%20CPE-VLAN1024.PNG?dl=0
>
> https://www.dropbox.com/s/kv1xs1ykh11iym8/Packet%20Capture%20Wan%20Int.PNG?dl=0
>
> https://www.dropbox.com/s/3cri7r5jdkh94qf/wireshark-vlan-1024.PNG?dl=0
>
>
>
> My Hope is someone here has seen this issue before and give me a sanity
> check
>
> TIA
>
> Cameron
>
>
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog
>