filtering long prefixes

Thu Sep 21 22:02:09 UTC 1995

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 at 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

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