My Netwok Dictionary

From the point of view, telephone, the protocol takes care of the voice signal for the establishment, management and culling call is SIP (Session Initiation Protocol). It is a protocol developed by IETF as a standard (RFC 3261) and supported in the client’s on-board mobile phone from Nokia.

The same SIP, then handles the message from the server side, ie the IP PBX, Cisco. The router in fact, the CME configuration, you can use two main VoIP protocols: a Cisco proprietary protocol called Skinny Protocol (SCCP), which is precisely the SIP. For an introduction to the protocol from the point of view, Cisco, see the documents listed on the site. Read the rest of this entry »

Panorama current on network security:

Network security and data protection has become a primary need in all businesses, especially the extension of networking for mission-critical networks with new intranet and extranet applications and e-commerce. A growing number of companies are looking for security skills and technologies, in order to delegate effectively protect systems and focus on their business strategy. And today is no longer sufficient to address the security concerns with traditional products only for perimeter defense. Read the rest of this entry »

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 »

For any type of switch or hub, you must follow the instructions.

Turn on the hardware box, and confirm its contents conform to the packaging. On the stack or the switch installed in the bracket (the proper use of rubber mats or frame), its location and any device connected to 10BaseT distance of not more than 100 meters, the temperature must be suitable for products, and maintain adequate ventilation.

When selecting cable, use any port through the cable, it had no marked “X” mark. X on behalf of a crossover cable. Type 5 cable is suitable for all ports, 100BaseFX port, except it needs to fiber media. Make sure the power outlet voltage and the voltage indicated on the label is the same, and connect power. Read the rest of this entry »

In the Windows operating system, the administrator can press the F8 key to start, choose a different boot method to repair faults. If the resolution to VGA mode to solve problems, and so does not match. In fact, Cisco routers have similar functions. When the router problems, such as when not start or can not load the configuration file, then you can start by changing the way to repair these failures router. Of course, if you want to use this feature, you must start the way the router in order to understand. In this article, the author first briefly introduce the way Cisco routers boot sequence, and then through the actual case notes, such as if by changing the startup mode to fix the router failure. We believe this article will bring some inspiration to the readers. 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 »

FCoE Cisco introduced a new product is equipped with a server to the storage array from end to end functionality, and as with previous products and MDS9500 Nexus has also been supported by the gateway.

FCoE, including through the Ethernet link to transmit information about the Fibre Channel protocol. Because Fibre Channel relies on the network without losing the decisive frame, so need to use the new Ethernet Converged Enhanced Ethernet. This is a lossless Ethernet, and functions, to ensure rapid FCoE packets sent through the link.

FCoE with the some, like the purpose has been limited to single-point gateway jump links, do not support the FCoE switch to transmit information. Cisco’s competitors have announced the end Brocade FCoE products. Read the rest of this entry »

With the release of Adaptive Security Appliance (ASA) software version 8.4, was finally introduced in the Firewall Cisco ASA 5500 Series Support for the Link Aggregation Control Protocol (LACP). The addition of this feature is to fill a considerable technological gap, which previously did not allow the SAA to interact Advanced Mode with all the series of high-performance switches with the features IEEE 802.3ad.

The protocol LACP belongs to a series of technical-level data link LY2 the ISO / OSI model can aggregate more physical Ethernet ports (up to 8 totals) into a single logical port. This procedure allows for high reliability, High Availability and redundancy individual physical connections and ports. Round robin and hashing techniques, internal to the protocol also allows for statistically redistribute traffic dynamically by running the choice of sending packets on a physical channel parameters on the basis of source IP, destination IP and port. In this way you get the functionality of load balancing simultaneously with the advantage of using different physical links, without introducing dangerous loop, ultimately expanding the total bandwidth, which is rather interesting if present only at 100 Mbps Fast Ethernet connections. 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 »