上行链路模块冗余

Kyon

电源冗余：4500，6500
power redundancy-mode combined | redundant
poe：总功耗 15.4W以下

能够提供冗余备份的机制：
1． IRDP，ICMP Router Discovery Protocol(ICMP路由发现协议)
2． HSRP，Hot Standby Router Potocol(热备份路由协议)
3． VRRP，Virtual Router Redundancy Potocol(虚拟路由冗余协议)
4． GLBP，Gateway Load Balancing Protocol(网关负载协议)
5． Cisco-SLB,Cisco Server Load Balancing

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