ALERT

[WEBINAR] Application Running Slowly? Time to Get Precise

Supernet

Definition - What does Supernet mean?

A supernet is created by combining several Internet Protocol (IP) networks or subnets into one network with a single classless interdomain routing (CIDR) prefix. The new combined network has the same routing prefix as the collection of the prefixes of the subnets. The procedure used to create a supernet is commonly called supernetting, route aggregation or route summarization. Supernetting enables organizations to modify their network size and minimize the extensive requirement of network routing devices by combining several independent routes. It also helps to conserve address space and helps the router to effectively store routing information and minimize processing overheads while matching the routes. Supernetting supports the CIDR address coding scheme, allowing routing table entries to be reduced.

Techopedia explains Supernet

Supernetting simplifies network routing decisions and saves storage space on route tables. While supernetting, data bits are borrowed from the network ID and allocated to the host ID. A larger and more complicated network can block other routers from making topological changes, so a supernet improves convergence speed and enables a better and more stable environment. Supernetting requires the use of routing protocols that help to support CIDR. The other protocols - Interior Gateway Routing Protocol, Exterior Gateway Protocol and Routing Information Protocol Version 1 - do not support the transmission of subnet mask information.

Network identifiers used in the supernet can have any length. This permits the organizations to customize network size based on their requirements. For instance, two blocks of class C can be supernetted for a total of approximately 500 addresses. The route aggregation feature of supernetting can be used to group routing information for multiple networks or hosts into one “summarized” route.

The supernet concept includes some drawbacks, the most notable of which is the complexity of CIDR compared to a classful addressing system and the need for new routing protocols that support the CIDR. The ability to customize the network identifier length also makes it harder for the system administrators to differentiate between a host identifier and a network identifier. In order to solve this issue, a new form of IP address writing called slash, or CIDR, notation was developed.

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources

JOIN US AT THWACKCAMP 2016:
THWACKcamp is an annual IT knowledge share event hosted by THWACK, the SolarWinds community of 130,000+ members. It's a two day event (September 14 -...
Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.