The net/aggregate port
aggregate-1.6p1 – optimise a list of route prefixes
Description
Takes a list of IPv4 prefixes in conventional format on stdin, and performs
two optimisations to attempt to reduce the length of the prefix list.
The first optimisation is to remove any supplied prefixes which are
superfluous because they are already included in another supplied prefix.
For example, 203.97.2.0/24 would be removed if 203.97.0.0/17 was also
supplied.
The second optimisation identifies adjacent prefixes that can be combined
under a single, shorter-length prefix. For example, 203.97.2.0/24 and
203.97.3.0/24 can be combined into the single prefix 203.97.2.0/23.
See the "aggregate6" package for an alternative tool that supports both
IPv4 and IPv6.
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