Ownership of Routers on Both Ends of Transnational Links

Tue Apr 16 19:47:10 UTC 2019

On Tue, Apr 16, 2019 at 10:59 AM James Jun <james.jun at towardex.com> wrote:

> More likely, thease routers are China Unicom's routers in their US POP, not managed by VZ/Telia.
> The /30s in this case are unmanaged IP transit hand-offs, coming in as Nx10G or 100G.  When your
> IP transit provider assigns the /30, your router looks like it belongs to your upstream, common
> mistake when interpreting traceroutes[1].
>

$ nslookup 62.115.170.56
56.170.115.62.in-addr.arpa name = sjo-b21-link.telia.net.

if you model (as james says) each interconnect as a /30 or /31 ...
look for the adjacent ip and see the PTR for that ip.
(the above is your first link example's peer ip)

> [1]: see Page 22 on https://www.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Traceroute_N47_Sun.pdf
>
> James