SDM express是安装到PC上的。现在的IOS都比较大，还是不要直接将SDM安装到路由器上。
但是SDM对浏览器和JRE比较挑剔。使用虚拟机xp +sp2+JRE 1.4.2_19即可解决访问问题。
使用SDM软件里面的8xx.cfg实例文件覆盖原路由器设置。注意要修改密码，改PC 的IP为同一10.10.10.0网段。
略做修改后的实例文件：
! version 12.3 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname cisco831 ! boot-start-marker boot-end-marker ! logging buffered 51200 warnings ! username admin privilege 15 secret 5 $1$v10U$6i7yfEWBUO/kZyTJ.oshu. no aaa new-model ip subnet-zero ! ! ip dhcp excluded-address 10.10.10.1 ! ip dhcp pool sdm-pool import all network 10.10.10.0 255.255.255.248 default-router 10.10.10.1 lease 0 2 ! ! no ip domain lookup ip domain name cisco.com ip ips po max-events 100 no ftp-server write-enable ! ! ! ! ! ! ! interface Ethernet0 description internal LAN ip address 10.10.10.1 255.255.255.248 no cdp enable ! interface Ethernet1 no ip address duplex auto no cdp enable ! interface FastEthernet1 no ip address duplex auto speed auto ! interface FastEthernet2 no ip address duplex auto speed auto ! interface FastEthernet3 no ip address duplex auto speed auto ! interface FastEthernet4 no ip address duplex auto speed auto ! ip classless ! ip http server ip http access-class 23 ip http authentication local no ip http secure-server ip http timeout-policy idle 60 life 86400 requests 10000 ! ! access-list 23 permit 10.10.10.0 0.0.0.7 no cdp run ! ! control-plane ! ! line con 0 login local no modem enable transport preferred all transport output all line aux 0 transport preferred all transport output all line vty 0 4 access-class 23 in privilege level 15 login local transport preferred all transport input telnet ssh transport output all ! scheduler max-task-time 5000 end