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Re: RFC1918 conformance

  • From: bgp4-adm
  • Date: Mon Feb 10 20:47:59 1997

Hi, Pierre.

These are the changes I have made in our sl-dc-10 router:

>router bgp 1790
> neighbor 144.228.120.130 remote-as 6846
> neighbor 144.228.120.130 version 4
> neighbor 144.228.120.130 distribute-list 50 in
> neighbor 144.228.120.130 distribute-list 111 out
> neighbor 144.228.120.130 route-map transit-in in
> neighbor 144.228.120.130 route-map transit-out out
> neighbor 144.228.120.130 filter-list 53 in
>
> access-list 50 deny 10.0.0.0 0.255.255.255
> access-list 50 deny 172.16.0.0 0.15.255.255
> access-list 50 deny 192.168.0.0 0.0.255.255
>
> clear ip bgp 144.228.120.130 soft out

Please let us know if there are any problems with this new configuration.
Thank you.

Ray,
Sprintlink


On Mon, 10 Feb 1997, Pierre Thibaudeau wrote:

> 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. 
> 
> >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
> 
> 
> 
> 
> 

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