Subnetting legacy Class B networks
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Neil J. McRae
neil at COLT.NET
Tue Dec 15 12:18:28 CET 1998
On Mon, 14 Dec 1998 12:27:09 -0500 (EST) Pierre Thibaudeau <prt at Teleglobe.CA> wrote: Pierre, This looks like SUNET's problem and not RIPE's. [check mnt-by]. Regards, Neil. > Hi, > > It was recently brought to our attention that RIPE have started to break > down some legacy Class B networks and assign individual subnets thereof: > > inetnum: 130.243.32.0 - 130.243.63.255 > netname: SE-DU > descr: Dalarna University > country: SE > admin-c: ANNO1-RIPE > tech-c: ANNO1-RIPE > status: ASSIGNED PA > mnt-by: SUNET-MNT > changed: fredrik at sunet.se 19981202 > source: RIPE > > This raises routability problems because many backbone operators filter > out BGP announcements of this range with prefix length longer than /16. > See for example <http://www.sprintlink.net/filter.htm>. > > And because, there is no "higher order" inetnum for the 130.243.0.0 - > 130.243.255.255 so this makes no one entitled (from RIPE perspective) to > advertise the 130.243.0.0/16 to solve the routing issues. > > And because of the lack of "higher order" inetnum, organisations like > Dalarna University come to believe that they have portable address space. > Portable, may be, but not necessarily routable. > > This problem is even further comlicated by the fact that administration of > this /16 network does not appear to have been delegated to RIPE: > > alpha 48: whois -h whois.arin.net 130.243.0.0 > Royal Institute of Sweden (NETBLK-NORDU4) > S-100 44 Stockholm > SWEDEN > > Netname: NORDU4 > Netblock: 130.242.0.0 - 130.243.0.0 > > Coordinator: > Liman, Lars-Johan (LL846-ARIN) LIMAN at SUNET.SE > +46 8 790 65 60 (FAX) +46 8 24 11 79 > > Domain System inverse mapping provided by: > > SUNIC.SUNET.SE 192.36.148.18 > SERVER.NORDU.NET 193.10.252.19 > > Record last updated on 16-Oct-98. > Database last updated on 11-Dec-98 16:11:39 EDT. > > Please investigate and clarify. > __ > > Pierre Thibaudeau | e-mail: <prt at Teleglobe.CA> > TELEGLOBE CANADA | e-page: <prt-p at Teleglobe.CA> > 1000, rue de La Gauchetiere ouest | > Montreal, QC H3B 4X5 | Tel: +1-514-868-7257 > Canada | fax: +1-514-868-8446 > -- Neil J. McRae - Alive and Kicking. C O L T I N T E R N E T neil at COLT.NET NetBSD-1.3.2 released! ftp://ftp.uk.netbsd.org/pub/NetBSD Free the daemon in your <A HREF="http://www.NetBSD.ORG/">computer!</A>
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