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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク High-availability Seamless Redundancy ： ウィキペディア英語版 High-availability Seamless Redundancy High-availability Seamless Redundancy (HSR) is a redundancy protocol for Ethernet (standardized as IEEE 802.3) networks. == Properties == HSR provides zero recovery time in case of failure of one component. It is suited for applications that demand high availability and very short switch over time. Such applications are protection for electrical substation automation and controllers for synchronized drives, for instance in printing machines. For such applications, the recovery time of commonly used protocols like the Rapid Spanning Tree Protocol (RSTP) is not acceptable. HSR was standardized by the International Electrotechnical Commission, Geneva, as IEC 62439-3 Clause 5. It is one of the redundancy protocols selected for substation automation in the IEC 61850 standard. HSR is application-protocol independent and can be used by most Industrial Ethernet implementations that use the IEC 61784 suite. HSR is typically used in a ring topology, however redundant connections to other networks are possible (such as a mesh topology). Especially the connection to PRP has to be mentioned. Since HSR and PRP use the same duplicate identification mechanism based on MAC source address and sequence number PRP and HSR can be connected redundantly. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「High-availability Seamless Redundancy」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.