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Application for automatic control of CISCO device configuration
Zbořil, Tomáš ; Jeřábek, Jan (referee) ; Kubánková, Anna (advisor)
The problem of mismatched running configurations on the networking devices is common and it is not always easy to troubleshoot. Another problem of the same scale is an analysis of the routing information in routers, its heterogeneity in terms of dynamic routing protocols, numerous various settings, and last but not least, management of these protocols. These problems require a software solution that would be helpful in analysis and would allow for automated addressing of problems found during the analysis. This master's thesis attempts to do this by designing and implementing such program for the protocol OSPFv2. It uses the SSH protocol to allow for retrieval of running configuration files from the devices and their comparison to the user-added configuration files. SSH protocol is also used to run commands on the devices and to gather their outputs, which are subsequently analysed. The output of the analysis is used in automated error correction, the correctness of which, is checked by the presence of the routes on the routers to the rest of the network.
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Optimalization Of Mobile Access Transport Network For 4g And 5g
Kolackova, Aneta
This paper deals with processing delay on edge devices (routers) in Radio Access Network (RAN) in the cellular systems with respect to the used operating system. Operating systems that allow virtualization and are designed for use in access networks are considered and compared i.e., Cisco IOS XE and the VyOS. Following the obtained simulation results from the GNS3 simulation tool, the right selection of the OS enables to achieve decreased processing delay in the given topology and communication scenario. Further, the findings obtained from the simulation scenarios indicate the need for more advanced simulations as the next-generation mobile networks i.e., Beyond 5G (B5G) are expected to handle data traffic with more demanding requirements on the Quality of Service (QoS).
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Evaluation of MPLS approach as a WAN technology for data transmissions in critical information infrastructure
Formánek, Juraj ; Blažek, Petr (referee) ; Fujdiak, Radek (advisor)
Thesis deals by using MPLS technology in energy critical information infrastructure and its comparison with another modern approach in the area of the WAN management. For this purpose was chosen a Software-defined Wide Area Network technology. This thesis contains theoretical description and practical tests of particular MPLS technologies on the WAN topology, which is considered as a virtual real topology of the EG.D’s company. Test were simulated in GNS3 emulator, using Cisco routers. Practical test were firstly focused on availability test when link or node failure occurs and secondly on route- reflector failures. Conclusion sums up appropriate approach for data transmissions in critical information infrastructure based on informations or practical test in this thesis.
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Measurement of qualitative parameters in the access network
Kejík, Tomáš ; Slavíček, Karel (referee) ; Grenar, David (advisor)
The theme of this bachelor’s thesis is „Measuring of qualitative parameters in an access network.“ The aim of this paper is a characterization of multimedia broadcasts in access networks and the creation of a functional network generator. The theoretical part of the paper is dedicated to analyzing key broadcasting parameters, which affect the resulting quality of network broadcast. Furthermore, used network protocols that are given for network and multimedia broadcast are analyzed. Simulation is done by using of GNS3 software. After that, transferred data were measured. Side effects affecting the functionality of the resulting transmission were subsequently analyzed. Another part of the paper is the practical part, which is focused on creation of a network generator by using the Bash language and making a script to facilitate turning on the generator for different counts of clients. At the end of the paper, the broadcast parameters were evaluated.
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Virtualization of laboratory tasks for the CISCO course
Abbasi, Farhad ; Komosný, Dan (referee) ; Kubánková, Anna (advisor)
Tato bakalářská práce se zabývá laboratorními úlohami pro novou certifikaci CISCO (CCNP ENARSI), seznámením se s tématy, výběrem nejvhodnějšího prostředí pro simulaci laboratorních úloh, vytvořením topologie pro každou laboratoř. Kromě topologie byl vytvořen konfigurační soubor (.txt) a nahrán do příslušného zařízení pro úlohy zaměřené na hledání problémů. V neposlední řadě bylo navrženo a implementováno řešení vzdáleného přístupu pro připravené laboratoře.
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Simulation Scenarios For The Analysis Of Mobile Transport Network Behavior
Kolackova, Aneta
This paper deals with finding ideal emulation environment for simulating mobile transport network. On top of that, two simulation scenarios were created and configured in chosen emulating programs. Further, this article briefly describes the architecture of a mobile transport network with an emphasis on using network protocols. The individual connections between the devices and their purpose of this network are described here.
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Application of simulation model of access network
Szymeczek, Andrzej ; Sládok, Ondřej (referee) ; Grenar, David (advisor)
The topic of the diploma thesis is " Application of simulation model of access network". The aim of the thesis was to create a part of the access network in which were tested simulations for TCP and UDP traffic. The theoretical part of the thesis deals with general information about the GNS3 program and the possibilities which this program allows. The next part of the thesis describes the Mikrotik RouterOS program, which was used in the topology. The next section describes the types of routing in IP networks, as well as the types of packet delivery. The practical part deals with the creation of test topologies and verification of the performance of the simulation tool. Furthermore, the practical part deals with the programming of a network generator for TCP and UDP traffic in the network. The generator was created by using a Bash script and a combination of the dd and nc commands. At the end, the thesis describes the results of simulations in terms of transmission speed, network throughput, packet size distribution and in the case of TCP also bidirectional delay – RTT.
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Basic properties of network protocols and communication techniques
Cigánek, Josef ; Jeřábek, Jan (referee) ; Dvořák, Jan (advisor)
The diploma thesis is focused on the basic properties of network protocols. The main task is to create laboratory tasks that deal with the basic features of network protocols and communication techniques, along with detailed instructions for students of communication technologies. The theoretical part of thesis acquaints the reader with the topic of computer networks and the basic network protocols of the TCP/IP architecture, which occur within the created lab. The practical part contains a selection of testing environment and subsequent description of installation and preparation of selected GNS3 environment. Finally are presented labs, which have been created. First lab deals with the basic differences between TCP and UDP. The second lab is focused on the issue of multicast and the third deals with the basics of penetration testing.
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Laboratory exercises explaining the principles of network technologies and protocols
Hricko, Tomáš ; Jeřábek, Jan (referee) ; Langhammer, Lukáš (advisor)
The aim of this diploma thesis is to create two exercises for students. The first exercise is concerned with comparison of transport protocols TCP and UDP. The second exercise is concerned with comparison of routing protocols OSPF and RIP. The first part describes used simulation environment. The next part describes the operating system used in routers. The following part describes the procedure of installing virtual machines. The next part consists of theory of protocols TCP, UDP, OSPF and RIP. The last two chapters are the laboratory exercises.
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Simulation scenarios for analysis of behavior of transport networks
Koláčková, Aneta ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
This master’s thesis deals with the issue of mobile networks, protocol suite TCP/IP and routing protocols. It focuses in particular on the functioning of the transport part of the third and fourth generation mobile networks and intends to fnd the most suitable options for their emulation. The master’s thesis compares two selected emulation programs through a series of tests that were performed on a server created for these purposes. The main outputs are two detailed comprehensive scenarios and solutions have been developed. The frst scenario deals with the overall transport network confguration. The second scenario is based on the frst one and is focused on troubleshooting of particular issues in this network. Their implementation helps to analyze the behavior of the transport part of the mobile network.
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