Trie shifting scheme with depth adjusting for multiple virtual routers

Y. Zhou; Y. Li; D. Jin; L. Su; L. Zeng; H.F. Rashvand

doi:10.1049/iet-com.2011.0591

Virtual Router Design and Modeling for Future Networks with QoS Guarantees

Electronics ◽

10.3390/electronics10101139 ◽

2021 ◽

Vol 10 (10) ◽

pp. 1139

Author(s):

Mykola Beshley ◽

Natalia Kryvinska ◽

Halyna Beshley ◽

Oleg Yaremko ◽

Julia Pyrih

Keyword(s):

Quality Of Service ◽

Dynamic Reconfiguration ◽

Future Internet ◽

End Users ◽

Mathematical Representation ◽

Optimal Parameters ◽

Resource Virtualization ◽

Virtual Routers ◽

Network Device

A virtual router model with a static and dynamic resource reconfiguration for future internet networking was developed. This technique allows us to create efficient virtual devices with optimal parameters (queue length, queue overflow management discipline, number of serving devices, mode of serving devices) to ensure the required level of quality of service (QoS). An analytical model of a network device with virtual routers is proposed. By means of the mentioned mathematical representation, it is possible to determine the main parameters of the virtual queue system, which are based on the first in, first out (FIFO) algorithm, in order to analyze the efficiency of network resources utilization, as well as to determine the parameters of QoS flows, for a given intensity of packets arrival at the input interface of the network element. In order to research the guaranteed level of QoS in future telecommunications networks, a simulation model of a packet router with resource virtualization was developed. This model will allow designers to choose the optimal parameters of network equipment for the organization of virtual routers, which, in contrast to the existing principle of service, will provide the necessary quality of service provision to end users in the future network. It is shown that the use of standard static network device virtualization technology is not able to fully provide a guaranteed level of QoS to all present flows in the network by the criterion of minimum delay. An approach for dynamic reconfiguration of network device resources for virtual routers has been proposed, which allows more flexible resource management at certain points in time depending on the input load. Based on the results of the study, it is shown that the dynamic virtualization of the network device provides a guaranteed level of QoS for all transmitted flows. Thus, the obtained results confirm the feasibility of using dynamic reconfiguration of network device resources to improve the quality of service for end users.

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Hands-On Network Device Virtualization With VRF (Virtual Routing and Forwarding)

Advances in Computer and Electrical Engineering - Design and Use of Virtualization Technology in Cloud Computing ◽

10.4018/978-1-5225-2785-5.ch014 ◽

2018 ◽

pp. 277-296

Author(s):

Ganesh Chandra Deka ◽

Prashanta Kumar Das ◽

Rahul Borah

Keyword(s):

Service Providers ◽

Internet Protocol ◽

Internet Service Providers ◽

Network Simulator ◽

Internet Service ◽

Routing Table ◽

Hands On ◽

Virtual Routers ◽

Technology Users ◽

Network Device

Virtual Routing and Forwarding (VRF) is a technology that allows multiple instances of IP (Internet Protocol) routing table to co-exist within the same Router at the same time. The routing instances are independent, allowing the same or overlapping IP addresses to be used without conflict. Using VRF technology, users can virtualize a network device from a Layer 3 standpoint of creating different “Virtual Routers” in the same physical device. Internet Service Providers (ISP) often use VRF technology to create separate routing table in a single physical Router which are completely isolated one from the others. This chapter discusses about the configuration of VRF-Lite in GNS3 (Graphical Network Simulator-3) on RIP/v2, EIGRP and OSPF protocols.

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