求大神指导以下思科模拟器CCNA实验如何做！！！

你的图上核心和路由器的互联地址不在同一个网段，我把路由器上的修改成172.211.205.2/28了，
SW3配置：
interface Vlan10
ip address 172.16.2.1 255.255.255.0
no shutdown
interface Vlan20
ip address 172.16.3.1 255.255.255.0
no shutdown
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
interface FastEthernet0/2
no switchport
ip address 171.211.205.1 255.255.255.240
ip route 0.0.0.0 0.0.0.0 171.211.205.2

R1配置：
interface FastEthernet0/0
ip address 171.211.205.2 255.255.255.240
ip nat inside
no shutdown
interface FastEthernet0/1
ip address 172.16.5.1 255.255.255.0
ip nat outside
no shutdown
access-list 1 permit any
ip nat inside source list 1 interface FastEthernet0/1 overload
ip route 0.0.0.0 0.0.0.0 172.16.5.2
ip route 172.16.0.0 255.255.252.0 171.211.205.1

SW2配置：
vlan 10
vlan 20
interface FastEthernet0/3
switchport mode trunk
interface FastEthernet0/24
switchport mode trunk
interface FastEthernet0/1
switchport mode access
switchport access vlan 10
interface FastEthernet0/2
switchport mode access
switchport access vlan 20
SW1配置：
vlan 10
vlan 20
interface FastEthernet0/3
switchport mode trunk
interface FastEthernet0/1
switchport mode access
switchport access vlan 10
interface FastEthernet0/2
switchport mode access
switchport access vlan 20

动态IP连接之后自动更换IP
静态IP即是固定IP
下载九州动态IP软件，支持模拟器多开
九州软件是用于在不同网络环境下快速切换IP地址等网络配置的软件工具