[11879] in North American Network Operators' Group
Internet Route Filtering
daemon@ATHENA.MIT.EDU (Robert Malally)
Thu Aug 21 16:15:24 1997
Date: Thu, 21 Aug 1997 13:32:26 -0400
To: nanog@merit.edu
From: Robert Malally <rmalally@bellsouth.net>
Hello,
Does any one truely know what the current route filtering polices are for
Sprint and MCI. The following rules are some that I have heard :
Sprint currently filters announcements from its
non-customers as follows:
RFC 1597 reserved space: accept nothing (**)
In the classical "A" space: accept nothing longer than /8
In the classical "B" space: accept nothing longer than /16
in 24/8 space: accept nothing longer than /19 (*)
in 195/8: accept nothing longer than /19
in 206/8 - 223/8: accept nothing longer than /19
in 192/8 - 205/8: accept nothing longer than /24
(*) in-line with the IP registries allocation
(**) RFC 1597> Private Address Space
RFC 1597> The Internet Assigned Numbers Authority (IANA) has reserved
RFC 1597> the following three blocks of the IP address space for private
RFC 1597> networks:
RFC 1597> 10.0.0.0 - 10.255.255.255
RFC 1597> 172.16.0.0 - 172.31.255.255
RFC 1597> 192.168.0.0 - 192.168.255.255
How are MCI and Sprint going to adjust their routing polices when the
reclaimed class A's are given out.
Thanks
Robert Malally
