10.0.0

Sat May 31 04:43:08 UTC 1997

I've noted several providers, including a couple of better-known ones,
using RFC1597 addresses internally. While not a Really Optimal Solution, it
does work, and if you find yourself with only a couple of class C's to work
with.. I'd probably rather preserve them for my customers, and go with
whatever I had to internally, as long as packets still got from A to B.

The only services that should be affected by the use of such "bogus"
addresses will be traceroute and any routing information passed by the
device. 

Much more interesting is when you have to connect to several different
customers, many of whom have chosen 10/8, 172.16/16, or 192.168.1/24 as
their core network addresses. 

Looks like Sierra is a customer of Phoenix Fiberlink, who is likely
dual-homed, since he's got a Sprint netblock transiting UUnet.

Hope that helps. 
----------
> From: Janet Pippin <jdp at cyberramp.net>
> To: nanog at merit.edu
> Cc: Larry Rosenman-CyberRamp System Administration <ler at cyberramp.net>
> Subject: 10.0.0
> Date: Friday, May 30, 1997 10:53 PM
> 
>   ALL:
>     Upon trying to discover an abuse site's network location, I
> happened upon this:
> 
>   Now, first it goes to sierra.. Then right after the trace finishes,
> I ran the second one..
> 
> traceroute to ns1.sierra.net (207.135.224.247), 30 hops max, 40 byte
packets
>  1  cisco.cyberramp.net (207.158.64.1)  2 ms  1 ms  1 ms
>  2  166.48.80.9 (166.48.80.9)  6 ms  8 ms  13 ms
>  3  core3.Dallas.mci.net (204.70.4.13)  5 ms  7 ms  16 ms
>  4  uunet-hssi.Dallas.mci.net (206.157.77.130)  26 ms  7 ms  56 ms
>  5  Fddi0-0.CR1.DFW1.Alter.Net (137.39.37.35)  103 ms  13 ms  15 ms
>  6  108.Hssi5-0.CR1.SFO1.Alter.Net (137.39.70.221)  135 ms  312 ms  348
ms
>  7  133.Hssi4-0.GW1.SLT1.Alter.Net (137.39.68.10)  104 ms  121 ms  122 ms
>  8  pfi-gw.customer.ALTER.NET (137.39.167.18)  108 ms  171 ms  106 ms
>  9  207.49.13.50 (207.49.13.50)  114 ms  117 ms  112 ms
> 10  207.14.235.22 (207.14.235.22)  112 ms  116 ms  113 ms
> 11  10.0.0.2 (10.0.0.2)  116 ms  108 ms  114 ms
> 12  rock.sierra.net (207.135.224.247)  116 ms  112 ms  113 ms
> 
> jdp at mailhost 18 ~ > wi 10.0.0
> IANA (RESERVED-6)
> 
>    Netname: RESERVED-10
>    Netnumber: 10.0.0.0
> 
>   hrmm...  and the second one:
> 
> jdp at mailhost 17 ~ > t ns1.sierra.net
> traceroute to ns1.sierra.net (198.60.22.2), 30 hops max, 40 byte packets
>  1  cisco.cyberramp.net (207.158.64.1)  2 ms  1 ms  1 ms
>  2  166.48.80.9 (166.48.80.9)  29 ms *  5 ms
>  3  bordercore1-loopback.Denver.mci.net (166.48.92.1)  210 ms  252 ms 
281 ms
>  4  electric-light.Denver.mci.net (166.48.93.254)  274 ms  273 ms  260 ms
>  5  F0-0.slkcib01.eli.net (207.0.56.18)  59 ms  59 ms  62 ms
>  6  XMISSION-DOM.slkcib01.eli.net (207.49.20.86)  64 ms  67 ms  69 ms
>  7  xmission.xmission.com (198.60.22.2)  60 ms *  88 ms
> jdp at mailhost 18 ~ > 
> 
>   enlighten me, someone...  :(
> 
> -janet
> 
> 
> 	Janet Pippin           *        CyberRamp Internet Services
>    Network Administrator      ***           11350 Hillguard Road
>      jdp at cyberramp.net         *         Dallas, Texas  75243-8311
>   http://www.cyberramp.net      *      (214) 340-2020  (817) 226-2020