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netaggregate is a tool to aggregate/summarize a list of IPv6 or IPv4 networks, addresses, CIDRs, prefixes.It expects IPv6 or IPv4 networks or address/length combination on stdint and outputs results of the aggregation to stdout.One can mix IPv6 and IPv4.IPs without mask are considered having prefix length of /128 and /32 respectively.If address/length is supplied, address part is truncated to the correct network prefix, i.e. bits are zeroed to match the length.Example of the input:

2001:DB8::/12010.10.0.1/162001:dB8::123172.16.14.142001:Db8::FfFf/96

Corresponding output:

10.10.0.0/16172.16.14.14/322001:db8::/96

Usage examples:

netaggregate < test-in.txt > result-out.txt

echo -e '2001:DB8::/120\n2001:DB8::FfFf/96' | netaggregate