This feature is new in the Solaris Express 8/04 release.
The Solaris 10 OS now includes the Zebra multiprotocol routing suite. This suite includes Open Source Zebra 0.92a routing software with bug fixes for Sun platforms. Now system administrators can use the well-known open-source routing protocols RIP, BGP, and OSPF for administering their Solaris based networks. Moreover, the OSPF daemon can be used for high network availability on multihomed servers. The Zebra packages contain these protocols and the zebraadm administration tool.
Refer to the /etc/sfw/zebra/README.Solaris file for configuration information and other details.