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North American Network Operators Group

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Re: RFC1918 conformance

  • From: Brett D. Watson
  • Date: Mon Feb 10 18:13:38 1997

> As specified in RFC1918 (ftp://ds.internic.net/rfc/rfc1918.txt) the
> netblocks 10.0.0.0/16, 172.16.0.0/12 and 192.168.0.0/16 have been
> allocated for "Private Internets". Consequently, these netblocks 
> should not be routed over the Internet.
> 
> As shown below, they are currently advertised from AS6848 and these
> advertisements are carried to us (AS6453) through various AS's of the
> SprintLink system. 

  while what you say is absolutely true (people shouldn't adversite 
them) i would say that it's as much your responsibility to block them 
at your edge routers.

-brett

> >sh ip bgp reg _6846$
> BGP table version is 9335417, local router ID is 207.45.201.5
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
> 
>    Network          Next Hop          Metric LocPrf Weight Path
> *> 10.0.0.0         144.228.164.57         0     90      0 1794 1239 1790 6846 ?
> *> 172.16.0.0/12    144.228.164.57         0     90      0 1794 1239 1790 6846 ?
> *> 192.168.0.0/16   144.228.164.57         0     90      0 1794 1239 1790 6846 ?
> [...]
> 
> AS6846 responsibles should take immediate action to remove these
> announcements. SprintLink, as any conscientious operator, should take
> action to filter out these announcements from any of its peers. 
> 
> Regards.
> __
> 
> Pierre Thibaudeau                     |   e-mail: <prt@Teleglobe.CA>
> TELEGLOBE CANADA                      |
> 1000, rue de La Gauchetiere ouest     |      Tel: +1-514-868-7257
> Montreal, QC   H3B 4X5                |
> Canada                                |      fax: +1-514-868-8446
> 
> 
> 
> 
> 

-brett


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