Subnetting legacy Class B networks

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
> 





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Neil J. McRae - Alive and Kicking.             C O L T   I N T E R N E T
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