[443] in North American Network Operators' Group
Re: filtering long prefixes
daemon@ATHENA.MIT.EDU (John Bradley)
Thu Sep 21 18:02:58 1995
Date: Thu, 21 Sep 1995 15:02:09 -0700 (PDT)
From: John Bradley <jbradley@westel.com>
To: Sean Doran <smd@sprint.net>
cc: nanog@MERIT.EDU, ejw@cyberstore.ca
In-Reply-To: <95Sep21.052749-0400_edt.20696+1119@chops.icp.net>
Resent-From: nanog@MERIT.EDU
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
