~/netref / BGP Aggregator
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BGP Aggregator

Summarize a messy advertised route list into the fewest exact covering CIDRs, then contrast that with the single smallest covering CIDR and flag the extra address space it would leak. Emits paste-ready aggregate-address and prefix-list lines.

routes (CIDR, comma / newline separated)
5 → 2 prefixes
10.0.0.0/2410.1.0.0/24
single summary 10.0.0.0/15 leaks 130,560 addresses (use the 2 exact aggregates instead)
// IOS aggregate-address
aggregate-address 10.0.0.0 255.255.255.0 summary-only
aggregate-address 10.1.0.0 255.255.255.0 summary-only
// prefix-list
ip prefix-list AGG seq 5 permit 10.0.0.0/24
ip prefix-list AGG seq 10 permit 10.1.0.0/24