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研究生:黃翰隆
研究生(外文):Han-Lung Huang
論文名稱:MPLS單點對多點傳輸之錯誤回復機制
論文名稱(外文):Survivable Point-to-Multipoint Communications in MPLS Networks
指導教授:翁永昌翁永昌引用關係
指導教授(外文):Yung-Chang Wong
學位類別:碩士
校院名稱:靜宜大學
系所名稱:資訊管理學系研究所
學門:電算機學門
學類:電算機一般學類
論文種類:學術論文
論文出版年:2008/07/
畢業學年度:96
語文別:中文
論文頁數:30
中文關鍵詞:錯誤回復路徑備援單點對多點傳輸多協定標籤交換
外文關鍵詞:Failure RecoveryBackup TreeP2MP CommunicationsMPLS
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MPLS是一個以標籤為依據的封包繞送技術,將標籤貼在封包的第2層(資料鏈結層) 表頭與第3層(網路層)表頭之間,因此又被稱做「2.5層的通訊協定」。MPLS備援機制是防止MPLS路由器或鏈結發生錯誤造成網路癱瘓的程序。區域修復(Local Repair)與路徑保護(Path Protection)為兩個最常見的備援機制。區域修復能夠快速從錯誤中回復,但需要花費相當多的備援頻寬;相反的,路徑保護需要較少的備援頻寬但是回復的速度較慢。

我們提出一個新的備援機制Notification Delay-Compromised (NDC)。NDC 分兩階段來建立備援路徑,並且能夠以些微的路徑切換延遲來換取有效地節省備援頻寬。模擬實驗結果顯示, NDC能在多付出2~5.4單位延遲的情況下,比Fast Re-route [14]節省3.9~26.2個單位頻寬。
Multiprotocol Label Switching (MPLS) is being designed by IETF MPLS Group. It can speed up network traffic and make it easier to manage. MPLS is a label switching technique that functioning between Layer 2 (Data Link Layer) and Layer 3 (Network Layer), and thus is often referred to as a “Layer 2.5 protocol”. To compare with traditional IP routing, MPLS has more efficient, speedy and flexible, because MPLS forward packets by labels instead of checking IP routing table.

MPLS backup mechanism is an entire procedure to protect from LSRs or links crashing in MPLS network. The two basic backup mechanisms are Local Repair and Path Protection. Local Repair could recover from crashing rapidly but has to spend more bandwidth. However, Path Protection has less bandwidth spending but more notification delay. In this thesis, we proposed a novel solution named Notification Delay-Compromised Protection Strategy (NDC), which made a compromise between bandwidth spending and notification delay. We adopt Path Protection through two phases and aim to saving more bandwidth spending by slightly notification delay.
中文摘要 ……………………………………………………………….. i
英文摘要 ……………………………………………………………….. ii
致謝 ……………………………………………………………….. iii
目錄 ……………………………………………………………….. iv
表目錄 ……………………………………………………………….. vi
圖目錄 ……………………………………………………………….. vii
第一章 緒論 ………………………………………………..……….. 1

1.1 MPLS 網路架構…………………………………..………... 1

1.2 錯誤回復機制 ……………………………….…………….. 3

1.3 論文架構 …………………………………………………... 5

第二章 相關文獻 ………………………………………….……….. 7

2.1 P2MP Sub-LSP Fast Reroute ……………………………….. 7

2.2 Backup Path Local Repair ………………………………….. 8

2.3 P2MP Backup Tree Fast Reroute ………………….……….. 9

第三章 NDC 保護機制 …………………………..………………... 12

3.1 路徑備援 …………………………………………………… 12

3.2 路徑切換 …………………………………………..……….. 16

第四章 系統模擬與效能評估 ……………………………………… 19

4.1 模擬環境 …………………………………………..……….. 19

4.2 效能評估項目 ……………………………………..……….. 19

4.3 實驗結果分析 ……………………………………..……….. 20

第五章 結論與未來研究方向 ……………………………………… 25

5.1 結論 ………………………………………………..……….. 25

5.2 未來研究方向 ……………………………………..……….. 26

參考文獻 ……………………………………………………………….. 27

附錄A ……………………………………………………………….. 29
[1] E. Rosen, A. Viswanathan, and R. Callon, “Multiprotocol Label Switching Architecture”, RFC 3031, January 2001.

[2] MPLS, http://en.wikipedia.org/wiki/Multiprotocol_Label_Switching

[3] Ivan Pepelnjak and Jim Guichard, MPLS and VPN Architectures, Cisco Press, 2002.

[4] Luc De Ghein, MPLS fundamentals, Cisco Press, 2007.

[5] S. Yasukawa, “Signaling Requirements for Point-to-Multipoint Traffic-Engineered MPLS Label Switched Paths (LSPs)”, RFC 4461, April 2006.

[6] D. Adami, S. Giordano, F. Mustacchio, and M. Pagano, “Design and development of a DS-TE experimental testbed with Point-to-Multipoint LSP support”, 3rd EuroNGI Conference on Next Generation Internet Networks, pp. 14-20, May 2007.

[7] L. Jorge and T. Gomes, “Survey of Recovery Schemes in MPLS Networks”, IEEE International Conference on Dependability of Computer Systems, pp. 110-118, May 2006.

[8] MPLS local protection, http://en.wikipedia.org/wiki/MPLS_local_protection

[9] L. Fang, A. Atlas, F. Chiussi, K. Kompella, and G. Swallow, “LDP Failure Detection and Recovery”, IEEE Communications Magazine, pp. 117-123, October 2004.

[10] C. C. Huang, V. Sharma, K. Owens, and S. Makam, “Building Reliable MPLS Networks Using a Path Protection Mechanism”, IEEE Communications Magazine, pp. 156-162, March 2002.

[11] H. Mellah, “Local Path Protection/Restoration in MPLS-based Networks”, IEEE APCC 2003, pp. 620-622, Vol. 2, September 2003.

[12] R. Aggarwal, D. Papadimitriou, and S. Yasukawa, “Extensions to Resource Reservation Protocol – Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE Label Switched Paths (LSPs)”, RFC 4875, May 2007.

[13] M. Kodialam and T. V. Lakshman, “Dynamic Routing of Bandwidth Guaranteed Multicasts with Failure Backup”, IEEE ICNP, pp. 259-269, 2002.

[14] G. Li, D. Wang, and R. Doverspike, “Efficient Distributed MPLS P2MP Fast Reroute”, IEEE International Conference on Computer Communications, pp. 1-11, April 2006.

[15] G. Chartrand and O. R. Oellermann, Applied and Algorithmic Graph Theory, McGraw-Hill, 1993.

[16] M. Kodialam, T. V. Lakshman, and S. Senqupta, “A Simple Traffic Independent Scheme for Enabling Restoration Oblivious Routing of Resilient Connections”, IEEE Infocom 2004, pp. 2329-2340, Vol. 4, March 2004.
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