VRRP是为增强网络可靠性而设计的协议，本文档在分析VRRP工作原理的基础上，对linux下的两种实现（VRRPD及keepalived）进行说明。VRRPD简单，但是基于RFC2338来实现；而keepalived则是LVS的一部分，可提供vrrp以及health-check功能。-VRRP is designed to enhance network reliability and agreement of this document is based on the principle of VRRP on the two implementations under linux (VRRPD and keepalived) explained. VRRPD simple, but realized based on RFC2338　and keepalived is part of LVS, providing vrrp and health-check function.