Tham khảo tài liệu 'routing5', công nghệ thông tin, chứng chỉ quốc tế phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Configuration Exercises 389 Configuration Exercises Refer to Figure 4-28 for Configuration Exercises 1-5. Figure 4-28 The Internetwork for Configuration Exercises 1-5 SVR3 16 ISP1 block 24 ISP2 block 24 1 ISP1 in Figure 4-28 has assigned the address block 24 to AS 3. ISP2 has assigned the address block 24 to AS 3. RTR1 and RTR2 are accepting full BGP routes from the ISP routers but do not transmit any routes to the ISPs. They run IBGP between them and OSPF on all Ethernet interfaces. No routes are redistributed between BGP and OSPF. The addresses of the router interfaces are as follows RTRl E0 24 24 RTR1 SO 30 RTR2 E0 24 RTR2 El 24 RTR2 SO 30 Please purchase PDF Split-Merge on to remove this watermark. 390 Chapter 4 Network Address Translation SVR1 is the DNS server authoritative for AS 3 its address is . DNS1 reaches SVR1 at whereas DNS2 reaches the same server at . Write routing and NAT configurations for RTR1 and RTR2 translating inside addresses appropriately for each ISP s assigned address block. Any inside device must be able to reach either ISP but no packets can leave AS 3 with a private source address under any circumstance. 2 The address of SVR2 in Figure 4-28 is and the address of SVR3 is . Modify the configurations of Configuration Exercise 1 so that devices within ISPl s AS connect to the servers round-robin at the address . 3 HTTP packets sent to from ISP2 are sent to SVR2 in Figure 4-28 SMTP packets sent to from ISP2 are sent to SVR3. Modify the configurations of the previous exercises to implement these translations. 4 Five outside devices in Figure 4-28 must appear to devices within AS 3 as having addresses respectively. Add the appropriate NAT .
