A group company originally established a head office in Beijing, then established a branch in Chengdu, and an office in Guangdong. The group has five departments: product, marketing, legal affairs, finance, and human resources. The entire network uses OSPF, RIP, ISIS, and BGP routing protocols for interconnection. The Group has established two data centers in Beijing, and a remote disaster recovery data center in Guizhou.
The network topology of the company is shown in Figure 1. SW1 and SW2 are the core switches in Beijing; SW3 is the core switch in Guizhou; FW1 is the exit firewall of the head office; FW2 is the firewall of the office; RT1 is the core router of the head office; RT2 is the router of the branch; AC1 As the wireless controller of the branch office, it works with AP1 to implement wireless coverage of the branch office.
Figure 1 Company network topology
Table 1: IP address allocation table for network equipment