native vlan

When a large number of subordinate organizations interconnect isolated networks, VLAN division is required for the management, security, and stable operation of the entire network for different functional departments.At the time of the rise of Enterprise Networks, due to the small scale of Enterprise Networks, limitations in application scope, lack of understanding of Internet access, and poor network security and management, so that the enterprise ne

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

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

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

[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

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

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

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

I didn't want to say a lot of theoretical stuff, but the OSI of note one is an important foundation of learning network so I'm going to talk a little bit more about what's practical.Switching technology: Note One refers to the switch is the second layer of data link layer belonging to the OSI model, which is primarily a function of making communication between devices of the same network segment.Some common functions of the switchVLAN Technology : You can separate device logic on the same switch

The article I want to share and configure VLAN on Linux through Cisco Catalyst Switch.Requirements:1. Linux installed on a PC with one or more NICs (Network Interface Card). I Use the Centos 5.4 using 2.6.18-164.11.1.EL5PAE kernel. It should is applicable on other Linux distros such as Slackware, Ubuntu, Fedora, Debian, etc.2. Cisco Catalyst Switch 29503.2 Pc/laptop running WINDOWS/LINUX/BSD/MACOSX4.3 Straight CablesThis tutorial is based-on Network D

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 Ethernet switch: introduces L2 VLAN forwarding, configurations in layer-3 Ethernet switches, MAC addresses, and L2 VLAN forwarding, I hope you will have a clear understanding after reading the following articles. The forwarding mechanism of a layer-3 Ethernet switch is divided into two parts: layer-2 forwarding and layer-3 switching. First, let's talk about the second-layer forwarding process. MAC a

Recently, I have participated in many discussion and evaluation activities on hospital network solutions. Almost all hospital solutions use VLAN technology, however, I found that VLAN design in most solutions has a common and fatal defect, that is, the core of VLAN spanning network. This article will talk about your views on this issue for your reference.VLAN mut

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

CISCO PT Simulation Experiment (9) Inter-VLAN routing for layer three switchesExperimental Purpose : Mastering the configuration of the switch Tag VLANMastering the configuration method of three-layer switch VLAN routingInter-VLAN communication via three-layer switchExperimental Background :The Company's finance department and sales department are in different of

For static and dynamic vlan configuration code instances of Huawei switches, there are many methods for configuring vlan of Huawei switches. Below is a sample code for vlan configuration of Huawei switches, I hope it will be helpful to the fans. either static or dynamic must be selected, followed by the vlan configurat