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