layer 2 network switch

Layer-3 Switch for Cisco switches Although single-arm routing solves the communication problem between different VLANs, it also has its fatal defects: -The single arm itself is the Backbone link of the network, which is easy to form a network bottleneck. -The sub-interface relies on physical interfaces, and the applic

queries VMPS to obtain the vlan id of the corresponding MAC address. 2) ISL label: ISLInter-Switch Link) is a protocol for transmitting VLAN information and VLAN data streams between switches, between switches and routers, and between switches and servers, by configuring ISL encapsulation on the port directly connected to the switch, VLAN allocation and configur

its main function. We know that on the LAN, a layer-2 switch identifies the packet sender through the source MAC address and forwards the packet according to the destination MAC address. For a data packet whose destination address is not on the local area network, a layer-

Case:There are two PCs at the front-end. After Windows 7 is started and the password is entered, the desktop file cannot be displayed (the desktop file is roaming on the win2008r2 server). In the lower-right corner of the screen, the Network Disk cannot be accessed. Refresh the desktop file.Analysis:The Network Disk prompts that it cannot be accessed because of two reasons. I. Hardware problems. Here the ha

support In addition to common layer-2 protocols, the current smart multi-layer switch also supports BGP, IS-IS, and other rich routing protocols, PIM multicast routing protocol, VRRP Redundancy backup protocol, and so on ~ Layer-4 protocol. Extreme, harbor, and other vendor

code + host code = router ID information Network Segment (Network Address) + host address = IP Address2.3 routing protocol 2.3.1 static Router Protocol You need to manually specify the target network that I want to arrive at. Which interface does the router use to connect (Fast route table convergence)2.3.2 dynamic Router Protocol In broadcast-like mode, each

The layer-3 switch technology is quite common, So I studied how to save the company's cost by using the layer-3 switch technology. I would like to share it with you here, hoping it will be useful to you. The layer-3 Switch Technol

Switch troubleshooting: a layer of equipment is used to help the detector. You are very interested in troubleshooting the switch. Before giving you a detailed description of how to troubleshoot a vswitch, let's first take a look at a layer of equipment, such as a hub, to help the monitor collect the required informatio

neighbors. Because the final simulated examination file of the student is stored on the server after being operated on the local machine, the network failure of the switch causes the simulated examination to fail. 2. Preliminary analysis, irrelevant to the server After observation, it is found that the fault occurs when the number of students accessing the serve

, L3 switching requires CPU intervention. The main tasks of CPU include running RIP, OSPF, and other routing protocols to generate route tables, and running ARP to parse IP addresses; set the cache IP Forwarding Table item. As a basic network, the IP network is evolving into a multi-service network. Therefore, network

It should be said that the current application layer switch has not been widely used. Although it has implemented all the functions of the high-level network, here we mainly introduce the future development direction of the application layer switch. Exchange Technology is mo

January SQL Killer caused more than 20,000 database servers in China to be affected, and the international export of a backbone network was nearly paralyzed; the March red Code worm's F variant spread to the Internet as much as 10多万次; the August shockwave and Sobig virus have so far been in the network, The affected host is already close to more than 2 million u

(1) Route selection protocol using path vectors(2) Each as requires a BGP spokesperson, these speakers Exchange routing information, build as connectivity graph, it is a tree structure, there is no loop The built as connectivity graph is as follows: composition of the 8.5 router : Divided into Routing and packet forwarding parts(1) Packet routing: construct the routing table based on the previous routing protocol and regularly update and m

It is very helpful to know about layer-3 switch ports. Here we mainly introduce the process of layer-3 Switch Port initialization. It may take 30 seconds or more to connect a computer to a vswitch before the computer can communicate over the network. If you are waiting for a

The processing of layer-3 data packets by the Gigabit route switch technology, I insist on writing notes every day. Record your experiences and put more time into your career. In the traditional sense, only the device that processes Layer 2 Data Forwarding is called a switch

Through the setting of flying Fish Star router, the network can be realized in 3 network segments of intranet. Suppose VE1260 a three-tier switch. Through the setting of flying Fish Star router, the network can be realized in 3 network segments of intranet. Assuming that VE

Three-layer Ethernet switch ip fdb table and its code example: How to filter incoming and outgoing packets in the access list when a three-layer Ethernet switch suffers from hardware processing problems in the following text, what about collecting evidence and contacting the security department or institution? Hardware

Onlookers: layer-2 exchange technology, PK layer-3 exchange technology. A traditional LAN switch is a L2 network device that constantly collects information during operations to create a MAC address table. Layer-3 switching is als

Layer-3 Switch SLB interface configuration layer-3 Switch configuration-configure a group of layer-2 ports www.2cto.com configure terminal to enter the configuration status nterface range {port-range} to enter the group configurat

From: http://nettao.blog.51cto.com/386537/211216 I, Vrrp Introduction: Virtual router redundancy protocol Virtual The proposed router redundancy protocol aims to improve the reliability of the router (layer-3 Ethernet switch) and the external connection by using the backup mechanism. Generally, a default route is set for all hosts in the LAN to specify the default route. Gateway, which enables communicat