Cisco3550配置radius:1.设置交换机的管理地址:interfacevlan1虚拟接口vlan1,管理地址在VLAN1.ipaddress172.16.2.11255.255.255.0write2.启用AAA认证:aaanew-model启用AAA认证aaaauthenticationdot1xdefaultgroupradius启用dot1x认证dot1xsystem-auth-control启用dot1x认证write启用IEEE802.1x认证。3.指定RUAIUS服务器的IP地址与交换机与RADIUS服务器之间的共享密钥:radius-serverhost172.16.2.10auth-port1812acct-port1813keywangqunradius-serverretransmit3write1812是系统默认的认证端口,1813是系统默认的记账端口。auto-port1812acct-port1813可以省略。key后面的wangqun为交换机与radius服务器之间的共享密钥。4.配置交换机的认证端口:interfaceFastEthernet0/1switchportmodeaccess设置为访问接口dot1xport-controlauto认证模式自动dot1xtimeoutquiet-period30失败重试30秒dot1xtimeoutreauth-period30重新认证30秒dot1xreauthentication启用802.1x认证spanning-treeportfast启动生成树portfast端口write保存