GNU Zebra is free software that manages TCP/IP based routing
protocols. It takes multi-server and multi-thread approach to resolve
the current complexity of the Internet. 

GNU Zebra supports BGP4, BGP4+, OSPFv2, OSPFv3, RIPv1, RIPv2, and RIPng.
  
GNU Zebra also supports Route Server and a Route Reflector.  It
provides full routing power under a new architecture. GNU Zebra is
unique in design in that it has a process for each protocol.
  
See the file INSTALL for building and installation instructions.
  
See the file REPORTING-BUGS to report bugs.
  
GNU Zebra is free software. See the file COPYING for copying conditions.