My Netwok Dictionary

Cisco today announced the availability of the new routers CRS3 (Carrier Routing System) designed to withstand the demands of today’s internet and video transmissions in real time, as well as future requirements of new online services of this decade and the future.

This new router has a capacity 12 times more work to the side nearest competition capacity and 3 times more than its predecessor from the same brand is designed for broadband communications and the new requirements and video entertainment on demand increasingly popular. Read the rest of this entry »

See the Cisco routing first thought is, it has become a lot of people can not erase the imprint of my mind. Routing technology as a founding company, Cisco’s position has never been in the routing in the industry that no one can shake, it can always research for the industry over to help, it can tell you exactly where excitement routing technology, which allows you to applications arising from new obsession. Read the rest of this entry »

If you are an IT expert, will often encounter a lot of computer users do not understand anything silly in the case of the system (such as a cup holder to drive bracket). However, in the maintenance of Cisco networks, we will make mistakes, is not it? In fact, we process in the maintenance of the network have also done a lot of stupid things, these errors can be avoided entirely. In order to help other network administrators avoid these costly mistakes, where management of Cisco routers are listed ten common mistakes, hope that we have to rectify.

1. No backup Cisco router configuration:

Although the article lists ten ways that there is no specific order, but if it is in order of importance, this section shall be in the first place. Imagine, your Cisco router crash, but overnight, the router will restore your boss will appreciate you how. However, if a network administrator, you can not configure the router to work as in the past, the boss will face what is it? In fact, the backup router configuration is very simple, just enter the following command: Read the rest of this entry »

Wireless router is used to network devices, how do we conduct a comprehensive understanding and use of it? The following article will give the details for the introduction of the wireless router.

In order to achieve the family share multiple computers share Internet surf the Internet access account, you need a broadband router device. Wireless Broadband Router allows multiple devices to wirelessly share a broadband Internet line. It is more than the average broadband router flexibility to avoid wiring, truly “plug and play.” You can now only need one device to connect to wireless networks and wired Ethernet to use Users to share high-speed broadband Internet connection. Read the rest of this entry »

Newspaper original TP-Link router, the 460T is used by nearly five years, with the growing number of Internet computers, performance and functionality can not meet existing demand, purchased a Huawei 3com’s MSR20-21 multi-functional router that multi-service, scalable, component-oriented platform, full support for IPv6, and support for MPLS VPN capabilities to meet various networking requirements.

After the arrival of the new router, start the configuration, as usual via the supplied serial cable, first configure the router’s WEB access address and access to the user name and Password and then through the WEB is the most convenient way to configure, and save the boring command line configuration, easy and intuitive. Log in to the router and follow the step by step wizard to set up the external network IP address, gateway and DNS server. Replaced the original installation of the router on the rack. Read the rest of this entry »

With the development of routing technology, also contributed to Router Protocol Perfection, here we introduce lessons learned Router Protocol, IP network design can not be in less than 1s fault recovery time, but VoIP, IPTV applications such as fault detection and recovery rapidly increasing demands put forward. Present as a draft IETF standard, bi-directional Forwarding Detection (BFD) provides a detection system to forward traffic link or ability, to improve fault detection and recovery.

From a technical speaking, BFD in the two routers establish a session between two routers used to monitor two-way forward path, the upper router protocol services. BFD itself does not discovery, but by the upper layer protocol to be served, the session is established in the test of time if not received on the side of the BFD control packet believes that fails, notify the upper layer service agreement, the corresponding upper layer protocol processing. Read the rest of this entry »

Router:

A router equipment is interconnected computer network which provide for the routing of packets between two or more networks to determine the path that a data packet can be taken.

When a user calls a URL The web client (browser) queries the name server, which indicates the ‘IP Address Terminal choice.

His workstation sends the request to the nearest router that is catwalk default of the network over which it is located. This router must thus determine the next terminal to which the information is sent so that the path chosen is the best. To get there, routers update routing tables, a real map of the routes to be followed as a function of the chosen. There are many protocols dedicated to this task.

In addition to their function routing, Routers allow you to manipulate the data in the form of circulating datagram’s to ensure the transition from one network to another. Now, given that networks do not have the same capacity in terms of size of data packets, routers are responsible for fragment data packets to allow their free movement. Read the rest of this entry »

Now the difference between routers and switches are becoming increasingly blurred, multi-layer routers and switches can realize the function of switching and routing between them there are different? What are their characteristics? How best to choose according to application requirements?

First, the traditional switches and routers:

Ordinary switches work in the Open Systems Interconnection (OSI) seven layer model of the second layer, data link layer Exchange for media access control (MAC) address based on the data stream to identify each packet’s source MAC address of a destination site, providing cheap, high-bandwidth network connections, but the ability to control packets are restrictions in the broadcasting area; routers work in the OSI seven layer model of the third layer, network layer, the data stream to identify the source and destination network address, control, limited the ability of the packet destination address the source of a pair, built-in routing protocols, while with large-capacity cache capacity, usually by routing software interconnection.

Ordinary switches and routers have some of their own deficiencies. If routers need to have very strong processor, its enormous routing table delays in the network, causing slow forward, and expensive, often become a bottleneck restricting high-speed transmission network; in common Layer 2 switch because only One purpose of reading the source MAC address, did not get a higher level packet information, which limited the exchange function, the main data stream does not have the necessary control. Read the rest of this entry »

Learn about some of the knowledge of Cisco router mode is very helpful, and here we explain all the various models of Cisco routers solutions, network security management involves many aspects, but look at a number of security events, you can get a basic conclusions, harm are due to neglect basic security measures caused. This article will discuss the maintenance of the importance of password security of Cisco routers, Cisco router models to explain and to show readers how to configure the router password-protected five network security.

With password protect the router for security reasons:

First of all, as Cisco equipment manager, we must recognize that the router does not exist any automatic password defense. Administrators must take seriously the problem of Cisco equipment, set the password. Cisco equipment is the soul of running IOS, it has a different Cisco router models. The Cisco router models are hierarchical settings, this means access to more in-depth, the more the privileges required for each of the corresponding level set the more passwords. Read the rest of this entry »

Multi-layer switch / router to forward packets at wire speed, switching to a distributed ASIC exists in the way, allowing the system to efficiently transport traffic.

Over the years, the processing speed of traditional routers there have been a lot of growth, but still powerful enough to keep up with the pace of applications. For example, they can forward per second are now nearly 100 million data packets. But consider a second to send 1,488,000 packets (pps), while the rate of 1,488,000 pps to receive data packets Gigabit Ethernet ports, 2 Gigabit Ethernet ports to be able to easily overload the system. With this form by contrast, the multi-layer switch / router to forward packets at wire speed, and the exchange of existing ASIC in a distributed manner, allowing the system to efficiently transport traffic. Read the rest of this entry »