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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