RFC1918 conformance

As specified in RFC1918 (ftp://ds.internic.net/rfc/rfc1918.txt) the
netblocks, and 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
Status codes: s suppressed, d damped, h history, * valid, > best, i -
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*> 0 90 0 1794 1239 1790 6846 ?
*> 0 90 0 1794 1239 1790 6846 ?
*> 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.


Hi, Pierre.

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

router bgp 1790
neighbor remote-as 6846
neighbor version 4
neighbor distribute-list 50 in
neighbor distribute-list 111 out
neighbor route-map transit-in in
neighbor route-map transit-out out
neighbor filter-list 53 in

access-list 50 deny
access-list 50 deny
access-list 50 deny

clear ip bgp soft out

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


Sorry, I forgot to include in the last email:

access-list 50 permit any

And I did a "clear ip bgp" without the "soft out".