CISCO PT Simulation Experiment (18) router DHCP server and relay configurationExperimental Purpose :Master the configuration method of router DHCP serverMaster the configuration method of DHCP relay AgentMastering the DHCP protocol and the principle and implementation process of the relayExperimental Background : with the expansion of the company's network, more and more office computers in the company, the
Because of the continuous advancement of social informatization, people's demand for data communication is increasing. Since the launch of TCP/IP protocol cluster in the 70 's, it has developed into the fact standard of Network layer communication protocol, and the Internet based on TCP/IP has become the largest and most important network. As the core equipment of IP network, routers have been widely used.
As the core equipment of IP network, the technology of
First, router settings and computer settings
1 Router setup Ⅰ, see the figure below.
2 router setup Ⅱ, see the following figure:
Change the WAN port address, change the LAN port address, and change the DHCP address range.
Important: The WAN port that the router sets is dynamic IP
When information needs to be transferred between two networks, the interconnection device of common routers is responsible for the transmission of data. The main work of the router is: The decision of the path and the forwarding of the packet (from the router an interface input, and then select the appropriate interface output); Maintenance path by the table.The way the
Tp-link routers cannot connect to the Internet a workaround
Tp-link wireless router, model "tl-wr841n", can be used yesterday, whether it is wireless or local connection. Today is suddenly unavailable, wireless and local are dead, the display cannot connect to the Internet. Reset key pressed over, reboot, and even restore factory reset. Not yet. Angry half to death. What the hell is going on here? (Also, the wireless
1. No line by automatic dialing failure
When using a wireless router for broadband dial-up access, we may often encounter the device can not automatically dial the strange phenomenon, when we encounter this phenomenon, we can from the following aspects to check: first of all to confirm the use of their own wireless router is the local telecommunications Department of the network license, If the device does
Original article: Grassroots Maintenance-Router network
On the Internet to see how to prevent the problem of hijacked routers is very good, it is true that we use the router at the same time should be prevented from being hijacked to protect our privacy and property security. Today, I share my personal experience of preventing routers from being hijacked.
A, hidden wireless signal name (SSID number) so th
In the days when wired networks are everywhere, the "figure" of the wireless LAN is approaching us, and there is a great way to work together with wired networks. Considering that the current wireless LAN networks are all made up of wireless routers, the efficient access to the wireless LAN is closely related to the status of the wireless router. Unfortunately, after a long period of work, the Wireless Router
Brother Dai has set up a new group company. His office is located in an office building in Qingcheng. Because the building is newly renovated, he cannot adopt a clear line pattern of holes and slots, it cannot be deployed in a dark line. The initial assumption is that the general manager's office, the personnel department, the marketing department, and the finance department are equipped with desktops, laptops, and wired and wireless Internet access. Let me talk about my configuration ideas. Con
tplink Router Optical fiber Setup Method
First, fiber optic cable, computer, wireless router connection method
Fibre-optic cable because there is no cat, you need to connect directly to the router, and you need to connect to a special WAN port on the wireless router, and there are four other core LAN ports that users
One, the internal components of the Cisco routerIn order to configure, Cisco Internetwork and troubleshoot, we must first understand the major components of the Cisco routers and understand these componentsThe respective function.Table 7-1 gives a description of the major components of the Cisco router.
The micro-code that the bootstrapper stores in ROM, the main function is to start it when the router
Http://tech.china.com/zh_cn/netschool/net/experience/684/20061230/13849743.html
This article takes the di-740p model of broadband router D-link, the default management address is 192.168.0.1, and the management port is 8080.Set the IP address and router management address of a computer to the same network segment, such as 192.168.0.2, open the browser of 192.168.0.2 computer, enter "http://192.168.0.1:8080"
Generally speaking, the router is establishes the LAN and the WAN Connection bridge, but at present the backup router's application is very widespread, simultaneously its function also more prominent. Cisco routers have a variety of backup technologies, today I will introduce the router's own backup technology and line backup technology.
First, the router backup technology
The router's own backup technolo
update from an adjacent site within 9 0 seconds, it does not consider the neighboring site unreachable. Every 30 seconds, the distance vector routing protocol will send the entire routing table to the neighboring site, so that the routing table of the neighboring site is updated. In this way, it can collect a list of networks from other sites (directly connected or otherwise) to make routing choices. The distance vector routing protocol uses the hop count as a measure to calculate the number of
Which command standard do you want Cisco to use on each vro? Each administrator configures the commands of each vro correctly. The ten commands in this article are what I think you should configure on each vro, with no special order.
1. configure a Logon account on the vro
I strongly recommend that you configure a real user name and password account on the vro and vswitch. This means that you need a user and a password to gain access.
In addition, we recommend that you use a secret password for
What if the wireless router does not surf the Internet?
First of all, of course, plug in the power cord, next is the network cable to connect the hardware equipment. The blue RJ45 interface in the figure is a WAN (usually only 1) connected to the ADSL modem via a network cable, while the four yellow RJ45 interfaces are LAN ports (usually 2-4), which are connected to a computer or notebook via a network cable. Now that the power is turned on and the
In the network, the use of various hardware will cause a high temperature environment. So we can use the hot backup routing protocol HSRP) for configuration. So what is the hot backup routing protocol HSRP )? The Hot backup routing Protocol HSRP, Hot Standby Router Protocol) is a routing Protocol that allows hosts on the Internet to use multiple routers as a single virtual Router) to maintain the connection
What if the router interface doesn't open? Don't worry, here are your illustrations.
1, the router interface does not open the phenomenon and troubleshooting.
1 Please confirm that your line is connected correctly, click the link to see if the line connection is correct.
2 Phenomenon 1: Local connection shows connected, but the router management interface is s
principle, using a Udpecho request instead of a ICMPECHO request to initiate an attack.
While cyber security experts are focused on developing devices that block Dos attacks, they have little effect because Dos attacks exploit the weaknesses of the TCP protocol itself. Properly configured routers can effectively prevent Dos attacks. In Cisco routers, for example, the iOS software in Cisco routers has many features that prevent Dos attacks, securing the rout
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