Frame Relay Error Detection
Contents |
Resources | Infrastructure Security | Cloud Security Network Software Linux for Networking WAN andLAN WAN Optimization | WLAN Deployment DataCenter Data Center Blog | Cloud | Software Defined Networking how frame relay works Network Management Network Management Systems | Concepts and Tools | Networking 101 |
Frame Relay Advantages And Disadvantages
IPv6 Migration Networking Hardware Ethernet Switch Buyer's Guide | Wireless LAN Controller Buyer's Guide | Wi-Fi Unified Communications
Frame Relay Definition
Slideshows Home Standards & Protocols Frame Relay Polling, Error Handling, and Specification Enhancements - Page 2 ByCisco Press | Posted Jan 25, 2002 Page 2 of 5 |Back to Page 1
Frame Relay Speed
Frame Relay Error Handling Frame Relay uses the Cyclic Redundancy Check (CRC) method for error detection. Frame Relay services perform error detection rather than error checking; error detection is based on the premise that the underlying network media is reliable. Frame Relay error detection uses the CRC checksum to determine if the frame is received by the Frame Relay networking device (router or frame relay cisco switch) with, or without, error. Error correction is left to the upper-layer protocols, such as the TCP (of the TCP/IP protocol suite). NOTE: Error detection detects errors, but does not make attempts to correct the condition. Error correction detects errors and attempts to correct the condition, usually under control or direction of a higher-layer protocol. The termination node performs error detection. Frame Relay Frame Format Figure 15-13 illustrates the standard Frame Relay frame format. Figure 15-13: Frame Relay Standard Frame Format (Click image for larger view in a new window) Table 15-7 presents a description of each of the Frame Relay standard frame fields. Field Description Flags Delimits the beginning and end of the frame. The value of this field is always the same and is represented as hexadecimal 7E or as binary 0111110. Address Contains the following information: DLCI -- The 10-bit DLCI is the most significant part of the Frame Relay header. This value identifies and represents the VC* between the FRAD and the Frame Relay [network service provider] switch. Each VC that is multiplexed onto a physical channel will be represe
Digital Network (ISDN) interfaces. Today, it is used over a variety of other network interfaces as well. This article focuses on Frame Relay's specifications and frame relay protocol architecture applications in the context of WAN services. Guide Contents Internetworking Basics LAN Technologies frame relay tutorial WAN Technologies Internet Protocols Bridging and Switching Routing Network Management Voice/Data Integration Technologies Wireless Technologies Cable Access Technologies Dial-up frame relay ccna Technology Security Technologies Quality of Service Networking Network Caching Technologies IBM Network Management Multiservice Access Technologies Contents 1 Introduction 1.1 Frame Relay Standardization 2 Frame Relay Devices 2.1 Figure: DCEs Generally Reside http://www.enterprisenetworkingplanet.com/netsp/article.php/10953_962071_2/Frame-Relay-Polling-Error-Handling-and-Specification-Enhancements.htm Within Carrier-Operated WANs 3 Frame Relay Virtual Circuits 3.1 Switched Virtual Circuits 3.2 Permanent Virtual Circuits 3.3 Data-Link Connection Identifier 3.3.1 Figure: A Single Frame Relay Virtual Circuit Can Be Assigned Different DLCIs on Each End of a VC 4 Congestion-Control Mechanisms 4.1 Frame Relay Discard Eligibility 4.2 Frame Relay Error Checking 5 Frame Relay Local Management Interface 6 Frame Relay Network Implementation http://docwiki.cisco.com/wiki/Frame_Relay 6.1 Figure: A Simple Frame Relay Network Connects Various Devices to Different Services over a WAN 6.2 Public Carrier-Provided Networks 6.3 Private Enterprise Networks 7 Frame Relay Frame Formats 7.1 Standard Frame Relay Frame 7.1.1 Figure: Five Fields Comprise the Frame Relay Frame 7.2 LMI Frame Format 7.2.1 Figure: Nine Fields Comprise the Frame Relay That Conforms to the LMI Format 8 Summary 9 Review Questions Introduction Frame Relay is an example of a packet-switched technology. Packet-switched networks enable end stations to dynamically share the network medium and the available bandwidth. The following two techniques are used in packet-switching technology: Variable-length packets Statistical multiplexing Variable-length packets are used for more efficient and flexible data transfers. These packets are switched between the various segments in the network until the destination is reached. Statistical multiplexing techniques control network access in a packet-switched network. The advantage of this technique is that it accommodates more flexibility and more efficient use of bandwidth. Most of today's popular LANs, such as Ethernet and Token Ring, are packet-switched networks. Frame Relay often is described as a streamlined version of X.25, offering fewer of the robust capa
View All Branch office network design Network disaster recovery VPN Design WWANs Telecom Services View All Cloud computing and SaaS Managed services Selecting telecommunications services http://searchenterprisewan.techtarget.com/definition/frame-relay and providers Topics Archive View All VPNs/Security View All Internet and application security Remote access VPN design VPN setup and configuration WAN Design View All Bandwidth and capacity planning Branch office network design Network disaster recovery VPN Design WWANs Infrastructure View All IP networks Network Infrastructure WAN protocols Optimization/Application frame relay Performance View All Application performance on the WAN WAN network monitoring WAN optimization and application acceleration Please select a category Telecom Services VPNs/Security WAN Design Infrastructure Optimization/Application Performance Section Get Started News Get Started Evaluate Manage Problem Solve Sponsored Communities Home Bandwidth and capacity planning Network software frame relay Definition frame relay error frame relay Posted by: Margaret Rouse WhatIs.com Share this item with your network: Sponsored News Leveraging Expert Managed Services for Optimal SQL Server Performance –Rackspace Three Questions to Ask When Moving to Hybrid Cloud –IBM See More Vendor Resources SingTel IP VPN Manufacturing Industry –Singapore Telecommunications Ltd Cutting Through the Complexity of Multi-Protocol Label Switching (MPLS) ... –NetScout Systems, Inc. Frame relay is a packet-switching telecommunication service designed for cost-efficient data transmission for intermittent traffic between local area networks (LANs) and between endpoints in wide area networks (WANs). The service, once widely available and implemented, is in the process of being discontinued by major Internet service providers. Sprint ended its frame relay service in 2007, while Verizon said it plans to phase out the service in 2015. AT&T stopped offering frame relay in 2012 but said it would support existing customers until 2016. Download this fre