[connect-wg] Programmatic way to answer, "Who is sending me this stuff?"

Aleksi
Thank you for the TREX document.
It would certainly help traceback if all parties adopted locally 
administered MAC addresses like this.

I encourage all IX's to consider this as at least a recommendation to 
members.

Of course, the IX itself has visibility via its switches, but members do 
not see that information so easily.

So this would be advice to members themselves for their own (mutual) 
benefit.
It certainly has less overhead then creating additional databases.

Regards
Steve

------ Original Message ------
From: "Aleksi Suhonen" <ripe-ml-2015 at ssd.axu.tm>
To: "snash" <snash at arbor.net>
Cc: connect-wg at ripe.net
Sent: 10/09/2015 11:20:18
Subject: Re: [connect-wg] Programmatic way to answer, "Who is sending me 
this stuff?"

>Hello,
>
>On 09/09/2015 01:13 PM, snash wrote:
>>If I receive some traffic at an IXpeering router interface, I might 
>>want
>>to know how I got it.
>
>>How do I find out who did send it to me?
>>If I capture a sample packet I could see the source MAC address.  Now 
>>I
>>have to identify who owns the device with that MAC.
>
>There is no unified method for doing what you want apart from the above 
>that would work on all IXPs.
>
>Some IXPs enforce a policy that their members have to use certain 
>pre-determined MAC addresses. Here's an example: (scroll to bottom)
>
>http://www.trex.fi/service/unicast.html
>
>There are also some IXPs that use an SDN core where they are able to 
>filter L2 traffic based on either IRR registered peering relationships 
>or actual BGP negotiated routes. I remember seeing nice presentations 
>about these at Euro-IX Fora, but I couldn't quickly find information 
>about them in the wild.
>
>Both of the above examples are rare and both have problems which hinder 
>their real world adoption.
>
>-- Aleksi Suhonen
>
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