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CCNA Exploration Truy cập các mạng WAN: Dịch vụ IP biểu Lab 7.4.1: Basic DHCP và NAT Cấu hình * Tháng Chín Tháng Chín * Tháng Chín Tháng Chín * Tháng Chín Tháng Chín R2 # 13 13 13 13 13 13 | CCNA Exploration Accessing the WAN IP Addressing Services Lab 7.4.1 Basic DHCP and NAT Configuration Sep 13 21 15 02.275 Sep 13 21 15 02.291 Sep 13 21 15 02.307 Sep 13 21 15 02.323 Sep 13 21 15 02.335 Sep 13 21 15 02.351 R2 NAT NAT NAT NAT NAT NAT s 192.168.10.11- 209.165.200.241 d 209.165.200.226 27 s 209.165.200.226 d 209.165.200.241- 192.168.10.11 27 s 192.168.10.11- 209.165.200.241 d 209.165.200.226 28 s 209.165.200.226 d 209.165.200.241- 192.168.10.11 28 s 192.168.10.11- 209.165.200.241 d 209.165.200.226 29 s 209.165.200.226 d 209.165.200.241- 192.168.10.11 29 Task 8 Configure NAT Overload In the previous example what would happen if you needed more than the six public IP addresses that the pool allows By tracking port numbers NAT overloading allows multiple inside users to reuse a public IP address. In this task you will remove the pool and mapping statement configured in the previous task. Then you will configure NAT overload on R2 so that all internal IP addresses are translated to the R2 S0 0 1 address when connecting to any outside device. Step 1 Remove the NAT pool and mapping statement. Use the following commands to remove the NAT pool and the map to the NAT ACL. R2 config no ip nat inside source list NAT pool MY-NAT-POOL R2 config no ip nat pool MY-NAT-POOL 209.165.200.241 209.165.200.246 netmask 255.255.255.248 If you receive the following message clear your NAT translations. Pool MY-NAT-POOL in use cannot destroy R2 clear ip nat translation Step 2 Configure PAT on R2 using the serial 0 0 1 interface public IP address. The configuration is similar to dynamic NAT except that instead of a pool of addresses the interface keyword is used to identify the outside IP address. Therefore no NAT pool is defined. The overload keyword enables the addition of the port number to the translation. Because you already configured an ACL to identify which inside IP addresses to translate as well as which interfaces are inside and outside you only need to configure the .
