This thesis is trying to appraise benefits of implementation Cisco Wide Area Application Services (WAAS) in the organization. It's a relatively new technology, which seeks to answer the question, how to maintain control over the ever-increasing volume of traffic. This constant increase is mainly due to the use of new applications and business processes. WAAS should transparently improve throughput, speed and ease of use of all applications in the organization. The question is if this technology can reduce costs, improve productivity, simplify data protection, or what manner it is compatible with the corporate infrastructure. If is really consolidating and pooling application infrastructure for remote branch back into the data center best current solution, which facilitates access to remote users, in same way to which they are accustomed from the Local Area Network (LAN). The next one sections of this work will be summarized findings on the principle of Cisco WAAS. How the technology works. What is main optimizing method and how is currently use in the organization. It's weaknesses and strengths against the largest suppliers of similar WAN optimization solutions. The next one section will carry out an analysis, which showed us results to determine which applications are suitable for optimization technology and statements for the policy, which will be applied to the applications. This raises so many questions to be answered. The outcome of this work will be whether this technology is really what the organization needs, and whether this technology is applicable to all or only for certain types of applications or application protocols.

Tématem této diplomové práce (dále jen DP) je návrh rozsáhlých podnikových sítí podle doporučení stanovených společností Cisco. Dále je realizována simulace navržené topologie prostřednictvím programů s otevřeným zdrojovým kódem a dohled nad sítí prostřednictvím programu Nagios. Úvodní část obsahuje stručné seznámení se základním rozdělením sítě do jednotlivých funkčních bloků. Druhá část se zabývá popisem jednotlivých funkčních bloků a jejich rolí v rámci celé síťové topologie. Bloky jsou dále rozděleny na jednotlivá zařízení a jsou popsány služby, které tato zařízení musí poskytovat. Třetí část DP se snaží zmapovat základní požadavky na služby, které jsou kladeny na dnešní síťové infrastruktury. Hlavní důraz je kladen na dostupnost všech nabízených služeb sítě. Jsou vyjmenovány jednotlivé protokoly druhé až třetí vrstvy OSI modelu, které zabezpečují stálou dostupnost sítě v případě selhání aktivních prvků. Čtvrtá část DP se věnuje popisu návrhu síťové topologie WAN. Pátá část obsahuje popis bezpečnostních rizik, která ohrožují dostupnost sítě, tak i popis útoků, které mají za cíl krádež identity uživatele. V šesté části DP jsou popsány programové nástroje pro zprávu sítí (Nagios, Cisco Security Device Manager) a programy, které simulují Cisco přepínače, směrovače (Dynamips & Dynagen, GNS3) a Cisco PIX firewall (PEMU). Sedmá kapitola se zabývá konkrétním návrhem rozsáhlé sítě s použitím principů, které byly zmíněny v předcházejících kapitolách. Navržená infrastruktura je dále realizována pomocí simulačních programů a tato virtuální síť dovoluje demonstrovat nastavení a chování všech popsaných protokolů a zařízení. V závěrečném shrnutí je nejdůležitější poznatek, že návrh a konfigurace rozsáhlé sítě a její realizace ve virtuálním prostředí je funkční a použitelná pro pokusné účely i pro studijní účely.

Master 's thesis deals about computer networks, which constitutes a global communication structure and play a very important role in today's society. The rapid development of Internet, the emergence of new multimedia applications and their increasing use of calls to the efficient functioning of the creation of such governance mechanisms of transmission, which are able to secure the required parameters. The thesis deals about the issue of quality of service (QoS) in IP networks. It presents the basic characteristics and requirements of these networks for the transmission of sensitive data by the quality of services, deals with the QoS definition, and describes the essential parameters to be followed to achieve the required quality of service in practical deployment. In addition, lists the various principles and options to ensure QoS in computer networks. Generally, it represents the Cisco 1841 router features and options to ensure quality of service in the network based on these routers. Practical thesis part provides two types of model IP networks, which were designed in order to verify the impact of service quality in real practice. Of the known methods to ensure QoS, which include a mechanism of Integrated services, Differentiated services, it focus its content about the Differentiated Services and the implementation of these in proposed network model. The last part of the work presents the results obtained by the impact of quality of service for the applications and their assessment.

This master's work deals with the design of laboratory exercises for Cisco Academy courses. Especially is oriented on Cisco technology. The theoretical part describes various devices used in the laboratory and the issue of functionality of these devices, such as switching, routing and solve any problems with the configurations of these elements. The practical part is directly generated designs laboratory exercises, focusing on specific examples of the problems from the configuration and network management with Cisco. An integral part of work consists of supporting the presentation of individual laboratory tasks, including configuration files, settings of the device. Create labs and verify the functionality of their configuration has been realized in the laboratory Cisco Academy Brno.

This thesis addresses the issues of network topology mapping, where the network consists of multiple Cisco devices. It includes theoretical knowledge in this field and closely describes possible solutions to this problem. It explains the process of design and implementation of this kind of network mapping software by chosen means. Correct function of the created application is tested on a virtual network.

The main goal of this master's thesis is to apprise of principles of Cisco One Platform Kit based on software defined networks and with monitoring techniques in that type of networks. The focus is concentrated on monitoring the quality of Voice over IP communication. Next part of this thesis is a proposal and implementation of the extensible monitoring environment OneMon on the Cisco One Platform Kit. It is possible to extend OneMon environment using specific analyzers to monitor various types of network traffic. The part of this master's thesis is also implementation of VoIP traffic analyzer for SIP and RTP protocols. This analyzer provides information about phone calls and their quality in a monitored segment of a computer network.

This master thesis deals with the implementation of the RIPng routing protocol in the OMNeT++/INET environment. It describes the RIPng protocol and its specifics on the Cisco devices. It clarifies important concepts such as IPv6 and distance-vector routing protocols. The thesis also describes the OMNeT++ environment and the INET Framework, where it focuses on the current status of implementation of the components required for the RIPng protocol integration.

The network simulation allows analysis of the computer networks behavior and configured protocols. This thesis focuses on the EIGRP routing protocol and its integration into the OMNeT++ simulation enviroment. The text includes a detailed description of the protocol and its configuration on Cisco devices. Furthermore, the text focuses on design of extension that supports routing protocol. The following describes implementation of the protocol according to design. Finally, the implemented solution is compared with the output of real devices.

Im Rahmen dieser Studienarbeit soll die Bedeutung klassenbasierter Anschlüsse im Chemnitzer Studenten Netz untersucht und Tools bereitgestellt werden, welche eine weitgehend automatisierte Anlage/Verwaltung solcher Netzklassen ermöglichen.

Det anonyma företaget är ett IT-tjänsteföretag som utför IT-tjänster efter kunds behov. De fick för några månader sedan en internetleverantör som kund. De sköter konfigurationen av internetleverantörens routrar och switchar som sen skickas till internetleverantörens företagskunder. Arbetet går ut pa att uppgradera operativsystem på routrar och switchar samt lägga till filer och sedan skicka produkt till internetleverantörens slutkund. Filer och operativsystem skiljer sig åt beroende på vilken typ av router och switch som ska uppgraderas. Arbetssättet idag är ineffektivt och det blir en del fel då man idag arbetar med USB minnen. Målet med detta arbete är att effektivisera deras arbetssätt genom att lagra alla filer på en TFTP server istället för på USB minnen. Ett skript ska skapas med språket VB script som automatiserar konfigurationen av routrar och switchar. Terminal för att kunna kommunicera med router/switch är SecureCrt. Personal på Företaget har sagt att det i snitt tar ca 15 minuter att konfigurera en router manuellt. Man kör endast en åt gången pga. kvalitetssäkring och man måste sitta framför skärmen under hela förloppet då man konfigurerar manuellt. Resultatet av mitt arbete ledde till en effektivisering. Tiden det tar att konfigurera en router hamnar pa samma tid, ca 15 minuter, dock kan man köra flera samtidigt men pga. platsbrist så kan de köra max två åt gången samtidigt som man inte behöver sitta framför skärmen då skriptet sköter all konfiguration. Det blev också säkrare att köra då man slipper leta efter rätt USB minne till motsvarande enhet. / The anonymous company is an IT company that performs IT services according to customer needs. They got an internet provider as a customer about a couple of months ago. They manage the configuration of the ISP's routers and switches, which are then sent to the ISP's corporate customers. The work involves upgrading operating systems on routers and switches as well as adding files and then sending the product to the ISP’s end customer. Files and operating systems differ depending on the type of router and switch to be upgraded. The working method today is inefficient and there can be some errors when working with USB memory sticks today. The goal of this work is to improve and make their operation more effective by storing all files on a TFTP server instead of on USB storage. A script will be created with the language VB script that automates the configuration of routers and switches. The terminal for communicating with the router/switch is SecureCrt. Staff at the company have said that it takes on average about 15 minutes to manually configure a router. You only configure one at a time due to quality assurance and you have to sit in front of the screen throughout the process when configuring manually. The result of my work led to an efficiency improvement. The time it takes to configure a router ends at the same time, about 15 minutes, however, you can run several units simultaneously but because of lack of space, they can run a maximum of two at a time, while not having to sit in front of the screen as the script handles all configuration. It also led to lesser errors as you do not have to look for the correct USB memory for the corresponding device.