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
L3 and L4 exchanges are very mature. The exchange technology is also widely used in the Internet, and the full exchange network is already very common. VLAN usage is essential in these networks.
1. VLANVirtual LANs) Description
A VLAN is a switched network logically divided according to its role, plan group, and application. It has nothing to do with the user's physical location. For example, several termin
There is an existing Huawei s5700 switch and a number of ordinary switches, as well as a tp-link router. The 1.tp-link router connects to the extranet. The 2.s5700 switch divides the VLAN. 3. Normal switch is connected to VLAN and PC side. The network topology diagram is as follows: 650) this.width=650; "title=" Initialsample "style=" border-left-0px; border-right-width:0px; border-bottom-width:0px; margin-
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
This article introduces the optimal performance of a vswitch in VLAN application configuration. The content of this article is as follows: filtering service function, Layer 2 network layer switch, Layer 3 network layer switch, data frame inbound, VLAN tag, below are some examples of different forms of switch VLAN applications.
Filter service features:
The filter
There are four ways to divide VLANs:
1. VLAN division by port
Many VLAN manufacturers use the ports of vswitches to divide VLAN members. The configured ports are all in the same broadcast domain. For example, Ports 1, 2, 3, 4, and 5 of A vswitch are defined as virtual network AAA. Ports 6, 7, and 8 of the same vswitch form the virtual network BBB. In this way, c
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
VLAN (virtual local area network), is based on the Ethernet interactive technology to build a fictitious network, can either divide the same physical network into multiple valn, can also cross the physical network barriers, users in different subnets to the same VLAN. Figure 2 is an example of a VLAN partition.
Figure 2
There are many ways to implement VLANs,
The switch is not designed to be used as a security device, and its function is still to improve network performance. If the switch is to be part of the security mechanism, if the switch is to be properly configured first, then the manufacturer of the switch will have a complete understanding of the basic standards of the switch software and the implementation of these standards.If you have strict network security requirements, or do not use a shared switch, you should use a dedicated switch to
Cisco switch VLAN interface IP Address Configuration 1. vswitch VLAN Interface static IP Address Configuration switch VLAN Interface static IP Address Configuration function requirements and networking description "Configure Environment Parameters" www.2cto.com 1. switchA is a layer-3 switch. the Ethernet port E0/1 connecting PC1 to SwitchA belongs to the Etherne
MUX VLANPrinciple:Devices within the same subnet (IP level), but not the same VLAN (2, 3, 10), can be used to adjust the role of the VLAN to communicate or not communicate, save IPTwo major classes of VLANs: Primary VLAN (primary interface), sub-VLAN (Group VLAN and isolated
When you configure VLANs in a virtualized environment, you need to understand the differences between VLANs and virtual VLANs on the physical switch to better configure the network.First look at the link type on the physical switch.Three types of links on the upper port of the switch: Access, trunk, Hybird.A port of type access can only belong to 1 VLANs and is typically used to connect to a computer's port;Trunk type port can allow multiple VLANs through, can receive and send multiple
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.
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* Vro
The vro is located at the network layer, which can isolate conflicting domains and broadcast domains. Each subnet (subnet) belongs to a broadcast domain. Broadcast cannot be sent between different subnets. Therefore, you must use a router (or a layer-3 Switch with routing functions) to control broadcast ). After a vro is used, the network Interface (LAN Interface) on the vro can be used to separate broadcast domains.
Generally, vrouters and vswitches are used to segment the LAN into a la
With the popularization of Switch Applications, VLAN technology is also widely used. As we all know, VLAN technology is mainly used to combine computers distributed in different geographic locations into a logical network as needed, while VLAN division can narrow the broadcast domain, to improve the network transmission speed, because computers in different VLANs
A vswitch is not designed as a security device, but is still designed to improve network performance. If you want to add a vswitch to the security mechanism, make sure that you configure the vswitch correctly, second, the switch manufacturer must fully understand and fully implement the basic standards of the switch software.
If you have strict requirements on network security and do not use shared switches, you should use dedicated switches to Ensure network security. If a vswitch must be share
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