On Jan 20, 2016, at 9:31 AM, Job Snijders <job@instituut.net> wrote:
On Wed, Jan 20, 2016 at 11:13:41PM +0900, Randy Bush wrote:
I propose the following axiom: the greater the distance over which a packet is forwarded, the less likely it is to be an IPv6 packet.
that is a hypothesis not an axiom [...]
Thanks.
but an interesting hypothesis. how do you propose to test it?
We could assert that the TTL is an indication of distance traveled.
Maybe one should record the TTL and Address Family of all packets received from the internet ('inbound') at the next NANOG or IETF?
One could likely just watch the traffic from CPE at a home of any DS user and track the TTLs there. The problem of course is networks that do not do TTL decrement, or are doing 6PE over an IPv4 only core. It makes this a less scientific study IMHO. These need to be weighted appropriately in results analysis. Might be an interesting discussion on the mat list, I know we can do SSL cert checks, but can we do http checks yet? (forgot the outcome). Could take the top N names from something like DITL and fetch them. - Jared