Layer-3 Ethernet switches are quite common, so I have studied the problems related to the CPU packet sending and receiving of layer-3 Ethernet switches. I would like to share them with you here, hoping they will be useful to you. Layer-3 Ethernet switches are developing rapidly. On the one hand, bandwidth and switching capacity of network devices are greatly increased, and the types of protocols supported by devices are also increasing with the increasing demand of users.
How to ensure the norma
course, it is mainly embodied in the personal firewall, because it is purely software and easier to implement. This firewall technology can effectively prevent the spread of viruses in the network, more active than waiting for attacks. Firewalls with virus protection can greatly reduce the company's losses.
2. Firewall Architecture Development Trend
With the increase of network applications, higher requirements are put forward for network bandwidth. This means that the firewall must be able
10 standard layer-3 switch technology hotspots), layer-3 switches basically have all the functions of traditional switches. The layer-3 switches shall prevail. The specific technical implementation of switches includes distributed pipelines, dynamic and Scalable Memory.
Layer 3 switch technology: programmable ASIC
ASIC is a dedicated Integrated Circuit dedicated to optimizing Layer 2 processing. It is the c
1.3.2.3 Memory ModelIn eka2, we define the ASIC memory structure in a module, that is, the memory model. Therefore, the memory management model encapsulates important MMU (Memory Management Unit) differences. For example, whether a cache is virtual or actually marked, that is, whether or not MMU exists. In eka1, memory and MMU assumptions are distributed throughout the operating system, making it difficult to produce a Mobile Phone Based on an
application traffic control products, it is generally difficult to achieve a processing capability of 1 GB, and many products still use this architecture on the market.
2. ASIC Architecture
Application Specific intergrated circuit (dedicated ic) accelerates hardware processing through specially designed ASIC chip logic. The advantage is that ASIC can solidify t
specialized processing capabilities and low costs makes DSP well suited for implementing signal processing functions in VoIP systems.
The computing overhead of G.729 voice compression on a single speech stream is very high, with a requirement of 20 MIPS. If a central CPU is required to process multiple speech streams, it also implements the routing and system management functions, this is unrealistic. Therefore, you can use one or more DSPs to detach the computing tasks of the complex voice com
-display hardware and Radeon_modeset_init () (in radeon_display.c) to Itialize the display hardware.The main workhorse of the driver initialization is radeon_device_init () found in radeon_device.c. first we Initializ e a bunch of the structs used in the driver. then Radeon_asic_init () is called. This function sets the Asics specific function pointers for various things such as Suspend/resume callbacks, ASIC reset, Set/process IRQs, Set/get engine cl
in cloud provider products. As the operator said, manufacturers seem to be more concerned with and pleasing shareholders, rather than continuing to solve technical problems, Nolle said. Network vendors seem to have given up in particular. They are mainly enough to focus on next-generation network technologies, such as software defined networks (SDN), he added.
"When the operator asked the vendor about the cloud strategy, the vendor said," Yes, we are in progress. But how many boxes can my colle
Korea LG Dacom Company under the South Korean LG Group, is second only to KT South Korea's largest IDC company, the room 13-storey building total area of 75040 square meters, is the highest quality data center in Korea. Compared to other IDC companies, the data center has more high-quality redundancy, constant temperature, power supply system, with more high-tech equipment, more excellent brand value. LG Engine Room server is Korea's strongest anti-attack server, is Korea's highest quality data
slow problem Resolution: IP One, do not support host name, add check address in Ipcheck function to solve2. Login device deployment Expect code, no processing authentication failure, or timeout and other basic check problems
Copy Code code as follows:
#coding: Utf-8
#!/usr/bin/python
'''
program:run.py
'''
Import Pexpect
Import datetime
Import time
Import OS
Import re
#tftp服务器Tftpserver= ' 192.168.1.115 '
#备份主机列表 "configuration format is as follows"#ip backup script [S
how they design IPs products, is how to effectively implement IPs active intrusion prevention function.From the security vendors, the foreign brands of McAfee, ISS, Juniper, Symantec, Huawei 3Com, domestic brands such as Bingfeng Network, NSFocus and many other manufacturers have a variety of hundred megabytes and gigabit IPs products, domestic brands (such as Bingfeng Network) of the performance of the gigabit IPs products relative to the past, has
pure Layer 2 solution is the cheapest solution, however, it provides the least control over subnet division and broadcast restrictions. Layer-3 switches provide dynamic integration support for all levels in the classification. Traditional general-purpose routers and external switches can also achieve this goal. However, compared with this solution, layer-3 switches require less configuration, less space, and less wiring, cheaper and more reliable performance.
A layer-3 Switch has all the functi
The principle of layer-3 switching has always been the most difficult for many readers to understand. In daily reader exchanges, we often see readers raise this issue, especially the differences and connections between layer-3 switching and routing principles. In fact, a layer-3 switch is closely related to both layer-2 switching and routing, and relies on layer-3 ARP protocol. The following describes the principle of layer-3 switching.
Layer-3 Switching Principle
L2 switches generally use the C
different applications between the client and the server, if a vro is fully functional, all this work can be done at a wire speed and multiple types of control can be implemented. Such a vswitch is called a vro. The query and control functions of the swagon router are implemented by hardware ASIC. The more information ASIC can collect about the traffic of the first packet, the more precise the control leve
contrast, multilayer switched routers focus all of these functions on a dedicated special application integrated circuit or ASIC. The ASIC is less expensive than traditional routers and is typically distributed across network ports. Today, a typical switch/router may include 50 ASIC in a single device that can support hundreds of interfaces. The new
Although the OpenFlow network has been a hot topic in recent months, and even enjoys star-studded popularity in Las Vegas's Interop 2011, but it is a protocol concept-a software-defined network-that can make real changes to virtualization and cloud networks.
In a software-defined network, switches and routers adopt some form of centralized software management elements. In the OpenFlow environment, the control platform is separated from the data forwarding platform. A centralized controller maint
Juniper firewall architecture:
1. Juniper firewall terms and basic components
A. Interface
Zone
Vro
Virtual System
View the firewall interface:
Fire-> get interface
View the firewall Zone:
Fire-> get zone
View the vro of the firewall:
Fire-> get vrouter
Virtualize multiple routing systems in the physical Firewall
View the firewall's virtual system:
Fire-> get vsys
Multiple firewalls in a physical firewall
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