实验书上的拓朴图：
注意TRUNK端口和路由器子端口设置，可以承载不同的VLAN标签。
交换机（用2691加交换模块实现的）：
Building configuration... Current configuration : 1623 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot-end-marker ! ! no aaa new-model ip subnet-zero no ip routing ! ! ! no ip cef ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 no ip address no ip route-cache shutdown duplex auto speed auto ! interface FastEthernet0/1 no ip address no ip route-cache shutdown duplex auto speed auto ! interface FastEthernet1/0 switchport access vlan 2 no ip address ! interface FastEthernet1/1 switchport mode trunk no ip address ! interface FastEthernet1/2 no ip address shutdown ! interface FastEthernet1/3 no ip address shutdown ! interface FastEthernet1/4 no ip address shutdown ! interface FastEthernet1/5 no ip address shutdown ! interface FastEthernet1/6 no ip address shutdown ! interface FastEthernet1/7 no ip address shutdown ! interface FastEthernet1/8 no ip address shutdown ! interface FastEthernet1/9 no ip address shutdown ! interface FastEthernet1/10 switchport access vlan 3 no ip address ! interface FastEthernet1/11 switchport access vlan 3 no ip address shutdown ! interface FastEthernet1/12 no ip address shutdown ! interface FastEthernet1/13 no ip address shutdown ! interface FastEthernet1/14 no ip address shutdown ! interface FastEthernet1/15 no ip address shutdown ! interface Vlan1 ip address 192.168.1.2 255.255.255.0 no ip route-cache ! ip default-gateway 192.168.1.1 ip http server no ip http secure-server ip classless ! ! ! ! ! ! ! ! ! ! ! ! line con 0 line aux 0 line vty 0 4 ! end
路由器A：
version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot-end-marker ! ! no aaa new-model ip subnet-zero ! ! ! ip cef ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/0.2 encapsulation dot1Q 2 ip address 192.168.2.1 255.255.255.0 no snmp trap link-status ! interface FastEthernet0/0.3 encapsulation dot1Q 3 ip address 192.168.3.1 255.255.255.0 no snmp trap link-status ! interface FastEthernet0/1 ip address 192.168.6.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/0 no ip address shutdown ! interface FastEthernet1/1 no ip address shutdown ! interface FastEthernet1/2 no ip address shutdown ! interface FastEthernet1/3 no ip address shutdown ! interface FastEthernet1/4 no ip address shutdown ! interface FastEthernet1/5 no ip address shutdown ! interface FastEthernet1/6 no ip address shutdown ! interface FastEthernet1/7 no ip address shutdown ! interface FastEthernet1/8 no ip address shutdown ! interface FastEthernet1/9 no ip address shutdown ! interface FastEthernet1/10 no ip address shutdown ! interface FastEthernet1/11 no ip address shutdown ! interface FastEthernet1/12 no ip address shutdown ! interface FastEthernet1/13 no ip address shutdown ! interface FastEthernet1/14 no ip address shutdown ! interface FastEthernet1/15 no ip address shutdown ! interface Vlan1 no ip address shutdown ! ip http server no ip http secure-server ip classless ! ! ! ! ! ! ! ! ! ! ! ! line con 0 line aux 0 line vty 0 4 ! end
注意不好的型号和不同的模拟设备，最好单独配置idlepc值。
用idlepc get r1----idlepc save r1获得和保存IDLEPC值，要不然，CPU会操爆的。。。如果IDLEPC值正确，则五六个模拟都没有问题的。
如果发现设置了IDLEPC值之后，计算机CPU值还是超高，则可以重新运算生成和保存。