|Operating system||GNU/Linux, BSD, Mac OS X|
The Babel routing protocol is a distance-vector routing protocol for Internet Protocol packet-switched networks that is designed to be robust and efficient on both wireless mesh networks and wired networks.
Babel is based on the ideas in Destination-Sequenced Distance Vector routing (DSDV), Ad hoc On-Demand Distance Vector Routing (AODV), and Cisco's Enhanced Interior Gateway Routing Protocol (EIGRP), but uses different techniques for loop avoidance. Babel has provisions for using multiple dynamically computed metrics; by default, it uses hop-count on wired networks and a variant of ETX on wireless links, but can be configured to take radio diversity into account  or to automatically compute a link's latency and include it in the metric.
Two implementations of Babel are freely available: the standalone sample implementation, and a version that is integrated into the Quagga routing suite. The version integrated into Quagga allows for authentication., while the standalone version has support for Source-Specific routing
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- Babel – a loop-free distance-vector routing protocol
- J. Chroboczek (2011), The Babel Routing Protocol, RFC 6126