Performance Tests on layer-2 and layer-3 vswitches with 24 ports and all-gigabit vswitches have encountered many problems recently. Experts have said that QoS ensures port congestion, high-priority data is processed first. It makes sense to improve the utilization of 24 fully-gigab
1) layer-2 Exchange Technology
The layer-2 switching technology is relatively mature. The layer-2 switch is a data link layer device that can identify MAC locations in data packets.Address information, which is forwarded based on the MAC address, and the corresponding MAC ad
Simply put: Layer-1 switchOnly physical layer protocols are supported (one phone-controlled switch can be called ???)L2 SwitchSupports physical layer and data link layer protocols, such as Ethernet switches.L3 SwitchSupports physical
Configuration example of cisco router and layer-3 Switch environment, cisco layer-3 SwitchSimple environment configuration instance for cisco router layer-3
Example:
3026
2012
5012. The value of 2nd bits is 0 ~ 4 indicates that it is a layer-2 switch.
3550. The fifth digit is 5 ~ 9 indicates that it is a layer-3 switch.
LI (LitesoftwareImage) indicates that the device is a weak feature version.
SI (StandardsoftwareImage) i
necessary means to solve the problem. A proper understanding of these features will be of great help to reasonably apply layer-3 switches. To this end, we will briefly introduce the mainstream features of layer-3 switches.
ProCurve5406zl is one of the mainstream three-tier switch
1,Layer-3 forwardingYesRoute information is requiredThe route selection in the forwarding process determines the final egress of the message,L3 SwitchJust put thisRoute functions are integrated into the switch ChipGo.
2,Route SelectionExistExact matchAndLongest matchTwo methods.
2.1,Exact matchThat is, the destination IP address and the route address information
about yuan. The appearance of these low-price layer-3 switches means that small and medium enterprises can also build high-performance networks. Of course, these tens of thousands of layer-3 switches can be used not only as the core of small and medium-sized enterprise networks, but also as the aggregation
when he cannot find the address, and the hub is only responsible for forwarding the email regardless of the Bounce Message.
Vro
A Router operates at the network layer, the third layer in the OSI Layer-7 network model. It works by removing the information of the second layer (data link
of using Server Load balancer to improve the scalability, availability, and manageability of Server clusters. This chapter mainly discusses the deployment of Server Load balancer and several solutions for deploying Server Load balancer in the existing network. We will also discuss how to design highly available solutions to implement fault tolerance for different network components throughout the network, including Load balancer.
Before discussing the network structure, we need to understa
applicable to IP and IPX traffic, it also applies to IP address multiplexing and bridge traffic. Catalyst 2948G-L3 supports a high-performance architecture with 22 Gbps bandwidth. The Switched Optical Fiber supports all 48 10/100 ports and 2 gigabit uplink connections at a wire speed.
The Catalyst 2948G-L3 can be installed in a 1.5RU chassis and can be equipped with an optional external redundant power supply. It supports 22 Gbit/s shared memory, com
indispensable for connecting subnets
If the number of computers on the same network exceeds a certain number, usually around 200, depending on the communication protocol), it is likely that the network transmission efficiency will be low due to a large number of broadcasts on the network. To avoid a broadcast storm caused by broadcasting on a large vswitch, You can further divide it into multiple virtual network VLANs ). However, this will cause a problem: Communication Between VLANs must be im
protocol), the network transmission efficiency may be low due to a large number of broadcasts on the network. To avoid a broadcast storm caused by broadcasting on a large switch, you can further divide it into multiple virtual networks (VLANs ). However, this will cause a problem: Communication Between VLANs must be implemented through routers. However, traditional routers cannot perform communication tasks between VLANs, because the Routing Capabili
switch. It is also because traditional routers are too weak in capabilities. The price of a gigabit router is unacceptable. Generally, the price of a third-level switch is around 10000 yuan, while that of a gigabit-level router is within the "" range.In addition to cost-effective,
of the entire network base layer. If the network size is very large, in this case, it is best to select a gigabit switch so that the next layer of the network can continue to connect to the switch for expansion, if the network size is not very large (at least 200 computers
traffic of LAN.
In addition, the price of a gigabit router is unacceptable. If you use a layer-3 Switch to connect to different subnets or VLANs through a gigabit or 10-Gigabit port, after Dividing subnets economically, subnets m
transmission efficiency will be low due to a large number of broadcasts on the network. To avoid a broadcast storm caused by broadcasting on a large vswitch, You can further divide it into multiple virtual network VLANs ). However, this will cause a problem: Communication Between VLANs must be implemented through routers. However, traditional routers cannot perform communication tasks between VLANs, because the Routing Capability of traditional routers is too weak compared with the network traf
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
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