implementing cisco quality of service lab guide

Ngày tải lên: 04/07/2014, 01:20

Ngày tải lên: 27/06/2014, 20:20

... eg. ToS field of IP o Problem l how to avoid everybody sendinghigh priority packets? Queue Management 1 Quality of Service in IP Networks CH-1015 Ecublens http://icawww.epfl.ch Prof. Jean-Yves ... Fast Retransmit o Probability p of choosing a given flow is proportional to the rate of the flow l more packets of that flow, higher probability of choosing one of its packets Queue Management 16 FIFO o ... duration o Burst duration - S sec o Size of the bucket - B bytes o Maximal departure rate - p bytes/s o Token arrival rate - r bytes /s l burst of B + r S bytes l burst of pS l B + rS = pS → S = B/(r -...

Ngày tải lên: 06/04/2013, 11:05

... that information instead of when a packet arrives. The 140 Chapter 9. Quality of Service Quality of service (QoS) is an often-used and misused term that has a variety of meanings. In this book, ... circuits must have a high percentage of loss-tolerable protocols (such as TCP). Cisco Labs' QoS Testing For the testbed, Cisco used a simple network with two Cisco VoIP gateways and one 56-kbps ... has a variety of meanings. In this book, QoS refers to both class of service (CoS) and type of service (ToS). The basic goal of CoS and ToS is to achieve the bandwidth and latency needed for...

Ngày tải lên: 30/09/2013, 05:20

Ngày tải lên: 18/10/2013, 12:15

... or more of the total number of RF channels required on a multiple link transport system for a specified amount of user grade of service. The percentage reduction depended on the number of radiating ... 5 A N N! B= i i! i=0 N A ∑ Improving Grade of Service (GOS) While Reducing RF Channels Wireless service providers are adopting new deployment strategies to reduce network costs and improve quality of service. In one urban ... “grade of service (GOS), which is the acceptable amount of network blocking of incoming call attempts. Typical wireless network designs in the United States provision channels to provide voice services...

Ngày tải lên: 10/12/2013, 19:15

... Service Signaling Quality of Service Signaling © 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_001.ppt Copyright © 2000, Cisco Systems, Inc. 40 © 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_010.ppt Keep ... the service policy named gary. http://www .cisco. com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120xe/120xe5/mqc/mcli.htm Copyright © 2000, Cisco Systems, Inc. 44 Quality of Service Signaling Quality ... host. http://www .cisco. com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_c/qcprt5/qcdrsvp .htm Copyright © 2000, Cisco Systems, Inc. 23 © 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_010.ppt Keep...

Ngày tải lên: 11/12/2013, 14:15

... significance of Quality of Service (QoS) • Describe new Quality of Service (QoS) features in Cisco IOS 12.1 • Explain which problems QoS solves The purpose of this module is to quickly survey the new Quality ... Inc. 1 © 2000, Cisco Systems, Inc. Introduction to Quality of Service Introduction to Quality of Service Copyright © 2000, Cisco Systems, Inc. 20 © 2000, Cisco Systems, Inc. www .cisco. com Econ_0385_02_010.ppt Keep ... framework Copyright © 2000, Cisco Systems, Inc. 18 © 2000, Cisco Systems, Inc. www .cisco. com Econ_0385_02_010.ppt Keep All Graphics Inside This Box IP-ATM Class of Service IP-ATM Class of Service Capabilities: •...

Ngày tải lên: 11/12/2013, 14:15

... in achieving QoS. © 2000, Cisco Systems, Inc. 1 © 2000, Cisco Systems, Inc. Campus Quality of Service © 2000, Cisco Systems, Inc. 17 © 2000, Cisco Systems, Inc. www .cisco. com econ_387_05_010.ppt Campus ... 802.1p field (referred to as class of service or CoS), which is part of the 802.1Q tag • At Layer 3 using the 3 bits of DSCP field in the type of service (ToS) byte of the IP header Classification ... Define Differential Service Code Point The objective of this module is to define the quality of service (QoS) tools which must be implemented to provide a voice-enabled transport service for IP telephony. A...

Ngày tải lên: 11/12/2013, 14:15

... Congestion avoidance, additive increase 24.23 24-5 QUALITY OF SERVICE 24-5 QUALITY OF SERVICE Quality of service (QoS) is an internetworking issue Quality of service (QoS) is an internetworking issue ... SERVICES 24-7 INTEGRATED SERVICES Two models have been designed to provide quality of Two models have been designed to provide quality of service in the Internet: Integrated Services and service ... Four cases of congestion 24.2 24-1 DATA TRAFFIC 24-1 DATA TRAFFIC The main focus of congestion control and quality of The main focus of congestion control and quality of service is service is...

Ngày tải lên: 06/03/2014, 12:20

... 105 5.9 References 106 6 Quality of service 107 6.1 Introduction 107 6.2 Routing in mobile ad hoc networks 110 6.3 Routing with quality of service constraints 112 6.4 Quality of service routing in ... independent. 1.5 Quality of service All the vulnerabilities enumerated in Section 1.3 above are potential sources of service impairment in ad hoc networks and hence may degrade the ‘ quality of service ’ ... associated with providing quality of service (QoS)in ad hoc networks. It should be pointed out that security and quality of service are two distinct attributes that are independent of each other in general....

Ngày tải lên: 25/03/2014, 12:07

... start out with a detailed review and discussion of available CLDs for both power control and MUD. Eventually, we are concerned with the Quality of Service (QoS) achieved with the different CLDs. ... 2011, 2011:9 http://jwcn.eurasipjournals.com/content/2011/1/9 Page 7 of 13 RESEARCH Open Access Quality of service implications of power control and multiuser detection-based cross-layer design Ulrike ... part of the frame is related to a contention phase and consists of several pairs of minislots. Each minislot is divided into the transmission of an RTS and a CTS signal. The second part of the...

Ngày tải lên: 21/06/2014, 03:20

... number of bits per symbol of modulation. This number depends on the MCS used.  c: represents the code rate of the Forward Error Correction (FEC). VI Contents Part 2 Quality of Service ... the available bandwidth. The rest of the chapter is organized as follows. Section 2 presents the features of the WiMAX MAC layer and of the WiMAX scheduling classes. The main components of the ... the classification of the scheduling mechanisms provided in the Section Quality of Service and Resource Allocation in WiMAX 4 3. Then, the performance evaluation of these algorithms...

Ngày tải lên: 21/06/2014, 05:20

... value of α, the greater the number of available subcarriers for each base station and the higher the level of multicell interference. There is therefore a tradeoff between the number of available ... of a cellular WiMAX network where a number of base stations need to communicate simultaneously with their respective active users 1 . Each of these u sers has typically a certain Quality of Service ... subset of subcarriers that are available for allocation in each cell (or sector) of the network. In some reuse schemes, the whole set of subcarriers is available for allocation in all the cells of...

Ngày tải lên: 21/06/2014, 05:20

... analysis of the network in the limit of large number of users.Theaimof this approach is to obtain op timal values of the resuse factor that no longer depend on the particular configuration of the ... IEEE802.11e enhancement (IEEE802.16e, 2006), that allows the quality- of- service management. Service and performance metric. The main objective of this chapter is to derive and compare the performance ... in the framework of several research projects at WiLab. The aim of SHINE is to reproduce the behavior of RATs, carefully considering all aspects related to each single layer of the protocol stack...

Ngày tải lên: 21/06/2014, 05:20

... format of the OFDMA slot is 8 data subcarriers of 6 OFDM symbols. The total number of OFDMA slots in a mobile WiMAX frame corresponds to S × T s where S = L d 8 and T s is the number of OFDM symbol ... link. WiMAX also defines a concept of a service flow. A service flow is a unidirectional flow of packets with a particular set of QoS parameters and is identified by a service flow identifier (SFID). The ... simulated. order of few dozens of meters (i.e., the coverage range of a WiFi), where both RATS are available; for this reason the x-axis of Fig. 5 ranges from 0 to 30 meters. The different curves of Fig....

Ngày tải lên: 21/06/2014, 05:20

... studying the impact of different parameters on the performance of contention-based services of IEEE 802.16. We evaluate the impact of the number of SSs (N) and the initial backoff window (W)on various ... traffic load of an SS, ρ. In the following, we will develop the outer set of fixed point equations for ρ. 3.2 Mean service time of an REQ This subsection presents the details of Block B of Fig. 2, ... until the start of the request interval where the backoff of the first attempt is initiated, and its backoff process from the beginning of the first request interval until the beginning of the request...

Ngày tải lên: 21/06/2014, 05:20

... providers. With regard to Quality of Service (QoS) control, the WiMAX system provides service differentiation based on the combination of a set of communication service classes supported by ... Policy Scheme Quality of Service and Resource Allocation in WiMAX 210 quality was maintained during the change of BS. The SS that experienced a hard handover did not receive 5% of the packets, ... This involves defining three mobility profiles: high, medium and low. Each mobility profile will be associated with the precise period of time Quality of Service and Resource Allocation in WiMAX...

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 05:20