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Aggregate a list of IP prefixes into their minimum equivalent representation
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More refactoring, add tests, aggregate6 compatibility
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README.md

rs-aggregate

rs-aggregate will aggregate an unsorted list of IP prefixes

Intended to be a drop-in replacement for aggregate6 with better performance.

Takes a list of whitespace-separated IPs or IP networks and aggregates them to their minimal representation.

Known discrepancies with aggregate6

  • rs-aggregate accepts subnet and wilcard mask formats in addition to CIDR, ie all these are valid and equivalent:
    • 1.1.1.0/255.255.255.0
    • 1.1.1.0/0.0.0.255
    • 1.1.1.0/24
  • -m/--max-prefixlen supports different maximums for each address family as ipv4,ipv6 format

Performance

Performance comparison of rs-aggregate vs aggregate6. A speedup of >100x is achieved on DFZ data.

Full DFZ (1154968 total, 202729 aggregates): dfz perf comparison

IPv4 DFZ (968520 total, 154061 aggregates): ipv4 dfz perf comparison