Text: This network topology is the network topology of a school, which has three physical areas: teaching building area, dormitory area and library area. Due to the demand, the school needs to build servers such as DHCP, WEB, DNS, FTP, etc., to realize the full netcom of the campus network.
The campus network designed in this paper adopts three-layer architecture of campus network, namely, access layer, convergence layer layer and core layer. The access layer adopts XXX (model, picture is too small to see clearly) switches, which are deployed in the teaching building area, dormitory area and library area respectively to realize the network access of terminals. In convergence layer, three XXX (model, picture is too small to see) switches are used to connect the access layer and the core layer, and dual links are used to connect the core layer to realize redundant backup load balancing. The core layer uses two XXX (model, picture is too small to see clearly) switches, and link aggregation is used between the two core switches to realize high-speed data forwarding. The campus network boundary router is connected to the external network through XXX firewall to realize the communication between the campus network and the Internet. Connect the server cluster through XXX switch to provide various services; And is connected with the network center.
Technology: Access layer, dividing VLAN and MAC address port binding (see if necessary). Convergence layer switch, the gateway is configured in convergence layer, the port of the lower access layer switch is configured as TRUNK, and the interface of the upper core layer switch is enabled with three-layer interface, which can be routed, and OSPF or RIP (static) can be selected. Link aggregation is done between the core layer switches, and the interface with the uplink router and the interface with the downlink aggregation switch adopts three-layer interfaces, and then the routing is run. Do VRRP or HSRP(PT simulator can command, but the function cannot be realized, so it can be done with GNS3 software). Router, which enables dynamic routing, declares the interface with the core layer switch, internal server switch and network center as dynamic routing, and then configures a default route to point to the external network.
Disadvantages: Topology planning is unreasonable in several places. Don't put the area above you, that is, the internal server. If you have a server and you want to open it to the outside world, that is, you want people outside the network to access it, then you should place this area and connect it to the firewall. We call it the demilitarized zone. Other servers that you don't want people outside the network to access, that is, servers that you want to access on campus, you should connect them to two routers in the core layer, which is reasonable. Your contact, whether it's an opening defense or a thesis defense, must be brought by the teacher. When you look at the picture, you will have questions and ask technical questions. And the library area. Is your computer going to connect to the wireless router wirelessly? This function can be realized by simulator. You can replace your desktop computer with a notebook computer, and then install a wireless network card to connect to the wireless router.
If there are any questions, let's continue our discussion.