BGP & OSPF Routing Optimization
Supernet & Route Summarizer
Aggregate multiple IP subnets into a compact summarized CIDR route. View bitwise common prefix analysis and Cisco IOS routing statements.
Enter at least 2 CIDR networks
Summarized Route
192.168.0.0/22
Aggregated CIDR block
Supernet Mask
255.255.252.0
Dotted decimal mask
Covered Host Capacity
1,024 IPs
Total addresses in supernet
Cisco IOS Static Route Statement:
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Frequently Asked Questions
Clear answers to common questions about subnetting, CIDR notation, and network design.
What is Supernetting (Route Summarization)?
Supernetting (also called Route Summarization or CIDR Aggregation) is the process of combining multiple contiguous smaller networks into a single, broader network route. By advertising one summarized route instead of many individual subnets, routers drastically reduce routing table size, memory overhead, and CPU load.
What are the requirements for summarizing routes?
For routes to be summarized into a single exact supernet without advertising extra space: 1) The subnets must be contiguous; 2) The number of subnets must be a power of 2 (2, 4, 8, 16, etc.); and 3) The starting network address must be an exact multiple of the supernet block size.