North American Network Operators Group
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Internet Route Filtering

  • From: Robert Malally
  • Date: Thu Aug 21 16:30:23 1997 
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