Ownership of Routers on Both Ends of Transnational Links

• Subject: Ownership of Routers on Both Ends of Transnational Links
• From: morrowc.lists at gmail.com (Christopher Morrow)
• Date: Tue, 16 Apr 2019 15:47:10 -0400
• In-reply-to: <[email protected]>
• References: <CA[email protected]> <CA+FDdDRZvt[email protected]> <[email protected]>

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

• Follow-Ups:
  • Ownership of Routers on Both Ends of Transnational Links
    • From: ross at tajvar.io (Ross Tajvar)

• References:
  • Ownership of Routers on Both Ends of Transnational Links
    • From: pzhu011 at ucr.edu (Pengxiong Zhu)
  • Ownership of Routers on Both Ends of Transnational Links
    • From: ross at tajvar.io (Ross Tajvar)
  • Ownership of Routers on Both Ends of Transnational Links
    • From: james.jun at towardex.com (James Jun)

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