vlan book

The expansion of VLAN enterprises in large and medium-sized enterprises with layer-3 switches has led to the continuous expansion of enterprise networks, many enterprises use the method of adding computers directly to the original network to expand the network scale. As a result, the network system becomes increasingly complex and network management becomes increasingly difficult, the security index in the network is also getting lower and lower, and

A sample code for VLAN configuration problems of a vswitch. It is very common to set a VLAN name. According to the 51cto editor, the basic knowledge about VLAN settings of vswitches must be tested in order to make greater progress. Apply to the port. First, set the VLAN name. Use the vlanvlan number namevlan name. Conf

I. Lab Objectives Master the configuration of the switch tag VLAN; Master the basic configuration methods of layer-3 switches; Measure the test taker's knowledge about how to configure VLAN routing for a layer-3 switch; Layer-3 switches are used to implement inter-VLAN communication; Ii. Lab background An enterprise has two main depart

The expansion of the enterprise scale has resulted in the continuous expansion of the enterprise's network scale. Many enterprises have adopted the method of directly adding computers to the original network to expand the network scale, the network system becomes more and more complex, and network management becomes more and more difficult. The security indexes in the network become lower and lower, and the utilization of network resources is also greatly reduced, how to effectively manage netwo

VLAN (Virtual Local Area Networkd) A VLAN is a logical network divided on a physical network. This network corresponds to the L2 network of the OSI model. VLAN division is not restricted by the actual physical location of network ports; A VLAN has the same attributes as a common physical network; Layer-2 unicast, broad

Tags: Database Cisco switch Communication Experiment: packet capture with intrinsic VLAN Lab Topology 650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M02/4D/D3/wKiom1Ra2eXDvF5vAACuEQ7Gk7A838.jpg "Title =" image 1.png "style =" float: none; "alt =" wkiom1ra2exdvf5vaacueq7gk7a838.jpg "/> Lab requirements The two PCs are in the same VLAN, so that the VLAN

Enable the VMware ESXi virtual switch to support VLAN Currently, virtualization is widely used. Generally, a physical host can create multiple virtual machines on a physical host after installing VMware ESXi or Hyper-V Virtual Machine Software, in addition, each created virtual machine can provide external services like the original physical machine, which can undoubtedly make full use of server resources to save power and space. But when most of our

Layer-3 switches are quite common, so I have studied how to build enterprise VLANs for layer-3 switches. Here I will share with you, hoping they will be useful to you. The emergence of Virtual lan vlan breaks the many inherent concepts of traditional networks, making the network structure flexible, convenient, and free to do as you like. VLAN divides user logic into working groups with relatively independen

Lab requirements: The topology is simulated based on the typical C3550-Headquarters-branch structure. The core route of the headquarters is C3550. The Extranet network uses the OSPF protocol and the Intranet is deployed through the VTP protocol to achieve network-wide interconnection.1, the headquarters core switch C3550-1 to create VLAN10/20/30/40, of which VLAN40 only for device management, do not port access, VLAN division.2, The C3550-1 is VTP Ser

[Background description]Before the user passes 802.1x authentication, the user belongs to a VLAN, which is the guest vlan. The unauthenticated client computers are in the guest vlan. They can only access the resources of the guest vlan server. After successful authentication, the port leaves the Guest

Any successful person is standing on the shoulders of giants to succeed, and I have not succeeded, and then I excerpt from an article and add some of their own experience to write about the VLAN, trunk and hybrid the difference:Ethernet ports have 3 types of links: access, trunk, HybirdAn access type port can only belong to 1 VLANs for connecting to a computer port;Trunk type port can allow multiple VLANs through, can receive and send multiple

VLAN and Trunk (1) Network performance is an important factor affecting business efficiency. Segmentation of large broadcast domains is one of the ways to improve network performance. A router can block a broadcast packet on an interface. However, the number of LAN interfaces of a router is limited. Its main function is to transmit data between networks rather than provide network access for terminal devices. The LAN access function is implemented by

If the port on the server has a pre-set trunk and allows certain VLANs to pass, then the server's network adapter must specify the VLAN it belongs to when it is configured, otherwise it will not work, which is more common in virtualized deployments.For example, in an office environment, the Office VLAN is 1020, the virtual physical host has two million gigabit network card, 3111 and 3112VLAN, which can be i

This paper mainly introduces the implementation of the 802.1Q VLAN protocol in the Ethernet switch, and some basic contents of the 802.1P protocol, details of the implementation of the two Protocols, and reference data of the 802.1Q and 802.1P protocols. First, 802.1Q protocol 802.1Q protocol, that is, Virtual bridged local area networks protocol, the main provisions of the VLAN implementation, below we f

size, you might as well use a switch to create VLANs.Management of VLANsVLANs are inextricably linked to switched networks, but implementing VLANs will redefine the management environment. VLAN-defined logical domains involve possible views of the network, so the network management platform can display IP images, and sometimes images based on IPX are displayed. If you deploy a VLAN, its topology may not ma

VLAN Division is also the most widely used and effective method. Currently, most VLAN-based switches provide this VLAN configuration method. This VLAN division method is based on the switch port of the Ethernet switch. It divides the physical port on the VLAN switch and the

Switch vlan + vrrp + stp, vlanvrrp Topology: Configuration code: Sw1 ------------ Sys Vlan 10 Vlan 20 Quit Int e0/0/1 Port link-type access Port default vlan 10 Int e0/0/2 Port link-type access Port default vlan 20 Int e0/0/3 Port link-type trunk Port trunk allow-pass

What if the number of VLANs is insufficient?-The Q-in-Q Technology of beacon network makes VLAN configuration more flexible (18:38:03) In the IP data network architecture, when using a vswitch as the access device and using a LAN as the access methodAn important issue is the isolation between users, because users connected to the LAN are often in the same broadcast domain, and their communication information can be monitored by other

Recently, a switch product in the company used VLAN-related things. It was hard to understand the things. I took some time to sort them out and showed them to the people who needed them, saving time. Let's get down to the truth. 1. VLAN Origin Traditional Ethernet is a broadcast network,NetworkAll Hosts in are connected through the hub or vswitch and are in the same broadcast domain. As the basic device fo

1. Create a vlan on the vswitch Create a vtp management domain To create a vlan on a vswitch, you must first create a vtp management domain so that it can verify the current vlan on the network. The Catalyst 4000 Series Switch module only supports 802.1q. Determine whether the hardware supports trunk and whether the hardware supports trunk encapsulation: show por