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Re: filtering long prefixes
From: John Bradley <jbradley () westel com>
Date: Thu, 21 Sep 1995 15:02:09 -0700 (PDT)

On Thu, 21 Sep 1995, Sean Doran wrote:

      reject BGP announcements which:

      -- are in the range of 206.0.0.0/8 to 239.0.0.0/8
         with a mask longer than 18 bits
      -- has a mask longer than 24 bits
- --

Unfourtunatly the Canadian IP registrar has been handing out addresses in
the 206.12.0.0/16  range to anyone applying for a IP address in Canada.

Sprint has several Canadian customers Sprint Canada, Cyberstore, and Hookup
that are anouncing routes to you in this block.

example

route:  206.12.112.0/24 
descr:  TRIN-NET 
origin:  AS3609 
advisory:  AS690 1:3830(11) 2:3830(147) 
mnt-by:  MAINT-AS3609 
changed:  ejw () cyberstore ca 950811
source:      RADB

The following are the addresses of my customers that would be filterd by 
this policy.  None of these people were told that these addresses could only
be routed to CA*net. 

[206/8        more-specifics]
[ prefix  as-path ]
206.12.202.0/23               3561    5071
206.12.206.0          3561    5071
206.12.208.0          3561    5071
206.12.237.0          3561    5071
206.12.238.0/23               3561    5071


Thanks for the warning.  I understand your reasons for this,  unfourtunatly
the Canadian IP registrar may have been unclear on the concept.

John

=============================================================
John Bradley                    | Office Phone (604) 990-2158
WesTel Telecommunications Ltd   |        Fax   (604) 990-2020
Vancouver, BC Canada            |        Cell  (604) 240-8478
John_Bradley () westel com         |      Autonomous System 5071




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