2: Bridge bridge in Win XP, this noun sounds like it is both familiar and strange, what is it? In fact, the bridge is a cheap and convenient way to connect the LAN (LAN) section. To understand how the bridge work, you need to know the LAN segment first. The LAN segment is a single part of the network media connected to the computer. For example, suppose you have three computers: Computer A, Computer B, and Computer C. Computer A has two Ethernet cards, while computer B and C have an Ethernet card. Connecting A and B Ethernet cables will create a LAN segment. Another connection A and C Ethernet cable will create another LAN segment. Traditionally, if you need a network with multiple sections, you have two options: route and bridge. IP routing is a common solution to the network segment. However, if you want to install the IP route, you need to purchase a hardware router or install a computer between the junctions to use as a router. For each computer on each computer, IP routing requires complex configurations for IP addressing, and each network segment needs to be configured as a separate subnet. IP routing is a solution suitable for large networks, which is important to scale, and empirical personnel are required to configure and maintain the network. Hardware bridging solutions are not necessarily complicated like IP routing, but it needs to purchase additional hardware bridges. If it is a family or small office network, these two options are not ideal, you are neither a need to buy expensive bridge hardware, and you don't want to ask yourself to manage IP routing networks. Instead, the bridge allows the LAN segment to be connected by selecting the appropriate network connection icon and click Bridge. Similar buttons allow you to enable the bridge and add the connection to the bridge. Bridge management of the LAN segment of the entire network and creates a single subnet. No configuration is required, do not need to purchase additional hardware (such as routers or bridges). In a single subnet IP network, IP addressing, address assignment, and name resolution will be highly simplified. The bridge can create a connection between different types of network media. In a conventional network, if a mixed media type is used, each media requires a single subnet, and you need to process packets between multiple network subsides. Since different media types use different protocols, packet forwarding needs to be used. "Bridge" automatically performs the required configuration to forward information from a media type to another. There is only one bridge on the Windows XP computer, but it can be used to bridge all computer actual network connections. "Bridge" uses the IEEE Crossing Tree Algorithm (STA) to establish a cyclic forwarding topology. When there is a plurality of paths in the bridge network, the loop can be formed, and the bridge's simple forwarding rules will result in forwarding storms, ie the same frame will be continued from one bridge to another bridge. STA provides automatic mechanism to selectively disable the bridge forwarding on a single port as necessary to ensure that the forwarding topology is non-loop. For cross-section algorithms, it is not necessary to configure a bridge. Said so much, then how to install and set up and use the bridge in the end, please listen to me in detail: First, create bridges: 1. Open Network Connections (To open Network Connections, click Start, point to Set ", then double-click" Control Panel ", click Network, and Internet Connections, and then click Network Connections.). 2. Under the "LAN or High Speed Internet", select each private network to connect it as a bridge. 3. Right-click one of the highlighted private network connections and click Bridge.
Second, add the connection to the bridge 1. Open "Network Connection". 2. Under "Bridge", right-click "Bridge" and click Properties. 3. Under "Adapter" of the General tab, select the check box for each adapter you want to add to the bridge, and then click OK. Third, enable or disable the bridge 1. Open the network connection. 2. Under "Bridge", right-click on "Bridge" and select one of the following: 3. To enable Network Bridge, click Enable. 4. To disable the Bridge, click Disable. Fourth, delete connection from the bridge 1. Open the network connection. 2. Under "Bridge", right-click "Bridge" and click Properties. 3. Under "Adapter" of the General tab, select the check box next to the adapter you want to delete, and then click OK. However, you should pay attention to the following aspects: You must log in as a member of the administrator or Administrators group to complete the process. If your computer is connected to a network, the network policy settings can also prevent you from complete this step; you must select at least two qualified network connections to create bridges with "Bridge"; Enable Internet Connection Sharing (ICS) or Internet Connection Firewall (ICF) The adapter cannot be part of the bridge, nor does it appear in the bridge list. Similarly, the "Add to Bridge" menu command only applies to an adapter that can be added to the bridge as a connection; only Ethernet, IEEE-1394 adapters or Ethernet compatible adapters such as wireless, and home phone line adapters (HPNA) Become a part of the bridge; if you do not enable ICF or Internet Connection Sharing (ICS), do not create a bridge between public Internet connection and dedicated network connections, or add a public Internet connection to an existing bridge. This will create an unprotected link between your network and the Internet, so your network is easy to attack; only one bridge can be created on a computer, but the bridge can accommodate countless network connections; cannot run Windows Create bridging on the 2000 or earlier version of the Windows computer; if the adapter is removed from the bridge, the retained adapter is not enough, the bridge does not perform the expected function, but the system resources will continue; when it is previously displayed When the network adapter under the LAN or high speed Internet is added to the connection, it will appear under "Bridge". A network adapter (such as DSL and cable modem) that provides Internet connection cannot be bridged, and will always appear under "LAN or High Speed Internet"; "Bridge" is used to create bridges before enabling bridges; if the bridge is disabled, Then the computer on the network will not be able to communicate with the computer on other network segments.
Some of the network may also interrupt the Internet connection; if the adapter is deleted from the bridge, the retained adapter is not enough, the bridge does not perform the expected function, but the system resources will continue to be used; at least two must be The adapter can be connected to the bridge to ensure its function; if the "Network Connection" folder is opened, you can also remove the network connection from the bridge. Under "Bridge", right-click the adapter you want to delete, then click "From Bridge Delete "; If the adapter is deleted from the bridge, but the reserved adapter is not enough, the bridge does not perform the expected function, but the system resources will continue. Bridges connected to wireless or IEE-1394 only support communication using Internet Protocol version 4 (IPv4); Internet connection sharing, Internet connection firewall, discovery, and control, and network bridge available in Windows XP 64-bit Edition available . So what effect does the bridge can achieve and what applied? In fact, through the bridge can carry the bridge group strategy, it is the "Bridge" to create a bridge across two or more network connections, so that network communication can pass all the networks included in the bridge. All of these connections are part of the same network subsidy. Group Policy settings define various components of the user desktop environment that the system administrator needs to manage. It is forbidden to install and configure on your DNS network, and use the bridge to determine if a computer user with administrative privileges can enable "Bridge" on the DNS network. The "Bridge" menu command "Bridge" is available only if there are two or more network adapters. By default, "Bridge" is disabled, but the administrator can enable it using the menu on the network connection icon. If you are enabled; it is forbidden to install, configure it on your DNS network network, and use the Bridge settings to disable the use of "Bridge" on the domain network, and because the "bridge" command is deleted from the network connection icon menu, So I can't create "Bridge". Computer users with limited permissions are configured to configure "Bridge", regardless of this setting. If "Bridge" already exists in the computer before enabling this policy, because the setting knows Location, this bridge will continue to exist. This setting will only be applied when the computer is connected to the same DNS domain network connected to the setting last refresh. If a computer (such as laptop) is connected to your DNS network, But the last refresh on the computer on the computer is performed on other networks, then this setting on your network will not be applied to the computer.
Windows XP Bridge features Today, in Windows XP, "Bridge" feature that connects to different network segments has been integrated, and its configuration is simple and easy, greatly facilitating interconnection and expansion between small and medium-sized LAN. Note the following points when configuring Windows XP network components: 1. Configuring Windows XP Bridge Servers do not formulate domain controllers and simply configure a stand-alone server. 2, the installed two network cards must be guaranteed to work, the test method is: Open "Control Panel → System", find the Hardware tab, click "Device Manager", expand "Network Adapter", see two network cards No yellow exclamation mark before the icon, "device status" is "normal". 3. The network communication protocol supported by the Windows XP Bridge is TCP / IP, which can only turn a packet in a network that communicates with TCP / IP protocol. However, the host operating system in the network does not have to be a Windows series, if it is a Linux or other operating system, as long as it is properly loaded with the TCP / IP protocol, the Windows XP bridge can work with them. Below, we started to configure Windows XP Bridge step by step. Step 1: Assign different IP addresses to two different network segments in the bridge. One of the two network segments we have to interconnect is 10.0.0.0. In the bridge, we can choose a network card, assign it fixed IP address 10.0.0.1, as a 10.0.0.0 network interface. The specific method is: Open the "Control Panel", select "Network", select "Properties" of "Local Connection" (first block), open "TCP / IP", select "Specify IP Address", fill in 10.0.0.1 The subnet mask is 255.0.0.0, and the gateway is 10.0.0.1. Similarly, we can specify the IP address of 192.168.0.1, the subnet mask is 255.255.255.0, and the gateway is 192.168.0.1. Step 2: Start the Windows XP Bridge. Right-click on "Local Connection" (first block), find "Create Bridge", after clicking, Windows XP will appear an icon of Network Bridge. But because of this There is only one network interface exists in the bridge, so the bridge is still not working for the time being (there is a red cross on the bridge icon). We also implement a new bridge in the "local connection 2" (second network card) " After Create Bridge, you can see that the icon of the bridge has changed. Right-click on the bridge icon, select "Properties", you can check the properties of this network interface just added, such as NIC Name, each bound IP address, etc. Step 3: After the bridge starts, the host gateway within 10.0.0.0 network segment is 10.0.0.1, and the host gateway within 192.168.0.0 segment will be set to 192.168 .0.1. We can choose a computer in a network segment of 10.0.0.0, such as 10.0.0.2, type "ping 192.168.0.2" in the command line, if you receive the response from "Reply from 192.168.0.2 ...", That is to say, the bridge work is normal, and the two network segments have been connected and can be exchanged.
The author has to add two points: 1. The Windows XP bridge is not limited to connection two network segments. It can connect multiple network segments to join the interfaces of the network segment in order to sequentially. 2, Windows XP bridge can only take the way to specify the network path, so the efficiency is not very high, in a large local area network, the data packet traffic required is large when the required packet traffic is larger than the dedicated router. More @:
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