[CentOS] CentOS + GNU Zebra

> If you only have one internet connection, that will be your default 
> route and you don't need a routing protocol.  You only need zebra if 
> you need to use dynamic routing protocols with adjacent routers, and 
> in that case it will work as long as it can match protocols, and it 
> will do bgp, ospf, and rip.

Yes Les, we need for this. Indeed I've seen GNU Zebra is a discontinued 
project and thier successor is Quagga project. Moreover, Quagga is a 
software included in [Base] repo.