面向軟件定義廣域網(wǎng)的路徑可編程性保障研究綜述

郭澤華; 竇松石; 齊力; 蘭巨龍

doi:10.11999/JEIT220418

面向軟件定義廣域網(wǎng)的路徑可編程性保障研究綜述

doi: 10.11999/JEIT220418

郭澤華^{1, 2, ,},
竇松石^{1, 2},
齊力^{1, 2},
蘭巨龍³

1.
北京理工大學(xué) 北京 100081
2.
復(fù)雜系統(tǒng)智能控制與決策教育部重點(diǎn)實(shí)驗(yàn)室北京 100081
3.
國(guó)家數(shù)字交換系統(tǒng)工程技術(shù)研究中心鄭州 450002

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(62002019)，北京理工大學(xué)青年教師學(xué)術(shù)啟動(dòng)計(jì)劃，國(guó)家重點(diǎn)研發(fā)計(jì)劃(2021YFB1714800)

詳細(xì)信息

作者簡(jiǎn)介:
郭澤華：男，研究員，博士生導(dǎo)師，研究方向?yàn)榭删幊叹W(wǎng)絡(luò)、機(jī)器學(xué)習(xí)以及網(wǎng)絡(luò)安全

竇松石：男，碩士生，研究方向?yàn)榭删幊叹W(wǎng)絡(luò)

齊力：男，碩士生，研究方向?yàn)榭删幊叹W(wǎng)絡(luò)

蘭巨龍：男，教授，博士生導(dǎo)師，研究方向?yàn)樾滦途W(wǎng)絡(luò)體系

通訊作者:
郭澤華　guolizihao@hotmail.com

中圖分類號(hào): TN929.5; TP393
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2022-04-08
- 修回日期: 2022-06-17
- 網(wǎng)絡(luò)出版日期: 2022-06-23
- 刊出日期: 2023-05-10

A Survey of Maintaining the Path Programmability in Software-Defined Wide Area Networks

GUO Zehua^{1, 2
, ,},
DOU Songshi^{1, 2},
QI Li^{1, 2},
LAN Julong³

1.
Beijing Institute of Technology, Beijing 100081, China
2.
Key Laboratory of Intelligent Control and Decision of Complex Systems, Beijing 100081, China
3.
National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China

Funds: The National Natural Science Foundation of China (62002019), Beijing Institute of Technology Research Fund Program for Young Scholars, The National Key Research and Development Program of China (2021YFB1714800)

摘要

摘要: 軟件定義網(wǎng)絡(luò)(SDN)被譽(yù)為下一代網(wǎng)絡(luò)的關(guān)鍵技術(shù)。近年來，SDN已經(jīng)成為學(xué)術(shù)界與工業(yè)界的熱點(diǎn)。廣域網(wǎng)是SDN應(yīng)用到工業(yè)界的一個(gè)重要的場(chǎng)景?；赟DN的廣域網(wǎng)被稱為軟件定義廣域網(wǎng)(SD-WAN)。在SD-WAN中，SDN控制器通過控制流轉(zhuǎn)發(fā)路徑上的SDN交換機(jī)來實(shí)現(xiàn)流的路徑可編程性。然而，控制器失效是SD-WAN中一種常見的現(xiàn)象。當(dāng)控制器失效時(shí)，流轉(zhuǎn)發(fā)路徑上的交換機(jī)會(huì)失去控制，流的路徑可編程性將無法得到保障，從而無法實(shí)現(xiàn)對(duì)網(wǎng)絡(luò)流量的靈活調(diào)度，導(dǎo)致網(wǎng)絡(luò)性能下降。該文對(duì)SD-WAN控制器失效場(chǎng)景下保證路徑可編程性的研究工作進(jìn)行了綜述。該文首先闡述了當(dāng)控制器失效時(shí)，SD-WAN中路徑可編程性保障研究的背景及意義。隨后，在查閱分析了國(guó)內(nèi)外相關(guān)文獻(xiàn)的基礎(chǔ)上，介紹了當(dāng)前在控制器失效時(shí)SD-WAN對(duì)交換機(jī)的主流控制方案。最后，對(duì)現(xiàn)有研究成果可能的進(jìn)一步提高之處進(jìn)行了總結(jié)，并對(duì)此研究的未來發(fā)展與研究前景進(jìn)行了展望。
- 軟件定義網(wǎng)絡(luò) /
- 廣域網(wǎng) /
- 路徑可編程性
Abstract: Software-Defined Networking (SDN) is the key technique of the next-generation network. Recently, SDN has become a hot spot in both academia and industry. Wide Area Network (WAN) is one of the primary application scenarios in the industry for SDN, which is known as Software-Defined WAN (SD-WAN). In SD-WAN, flexible traffic scheduling and network performance improvement are realized by the flow path programmability, which is enabled by the SDN controller to change dynamically the paths of flows traversing SDN switches. However, controller failure is a common phenomenon. When the controller fails, the switches controlled by the failed controller become offline, and the flows traversing the offline switches become offline too. In this way, the path programmability can not be guaranteed, and thus flexible flow control becomes invalid, leading to severe network performance degradation. This survey is presented to introduce the research works on maintaining path programmability in SD-WAN. First, the path programmability and the important feature for maintaining the path programmability in SD-WAN are introduced. Second, different types of existing solutions for coping with the controller failure in SD-WAN are proposed. Finally, potential improvements and future directions on this research topic are proposed．
- Software-Defined Networking (SDN) /
- Wide Area Network (WAN) /
- Path programmability

HTML全文

圖 1 SD-WAN中流f的路徑可編程性例子

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圖 2 OpenFlow協(xié)議中多控制器連接方案的例子

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圖 3 保證路徑可編程性的相關(guān)工作分類

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圖 4 新型流粒度控制方法架構(gòu)

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圖 5 混合路由模式

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表 1 保證路徑可編程性的研究現(xiàn)狀

恢復(fù)類型	恢復(fù)目標(biāo)	恢復(fù)方法	優(yōu)化目標(biāo)	求解方法	參考文獻(xiàn)
靜態(tài)	降低失效概率	最優(yōu)控制器放置	控制延遲	帕累托最優(yōu)	[11]
			控制器部署代價(jià)和路由代價(jià)	ILP	[12]
			所需控制器數(shù)量	ILP和啟發(fā)式算法	[13]
			控制延遲	MILP和模擬退火算法	[14]
			控制延遲	啟發(fā)式算法	[15]
			節(jié)點(diǎn)重要程度	啟發(fā)式算法	[16]
			鏈路升級(jí)成本	ILP	[17]
		彈性控制結(jié)構(gòu)設(shè)計(jì)	IP路由器更新數(shù)量	啟發(fā)式算法	[18]
			控制器視圖異構(gòu)度	啟發(fā)式算法	[19]
			控制器利用率	ILP和啟發(fā)式算法	[20]
			控制路徑失效數(shù)量	ILP	[21]
			映射魯棒性	ILP和啟發(fā)式算法	[22]
	降低失效后影響	主從控制器分配	負(fù)載變化	ILP和啟發(fā)式算法	[23]
			控制延遲、控制器負(fù)載均衡和映射魯棒性	ILP和啟發(fā)式算法	[24]
			控制延遲	ILP和貪婪算法	[25]
			控制器負(fù)載均衡	ILP和模擬退火算法	[26]
			控制延遲	MILP和貪婪算法	[27]
		失效檢測(cè)	控制器恢復(fù)效果	基于區(qū)塊鏈的啟發(fā)式算法	[28]
			應(yīng)用服務(wù)質(zhì)量	控制器負(fù)載遷移框架	[29]
			故障恢復(fù)速度	高級(jí)消息隊(duì)列協(xié)議	[30]
			網(wǎng)絡(luò)可靠性、電力成本和控制延遲	ILP、基于SVM的分類法和貪婪算法	[31]
			重映射成本	ILP	[32]
			控制器負(fù)載均衡	基于控制器負(fù)載的貪婪算法	[33]
動(dòng)態(tài)	維持控制彈性	交換機(jī)-控制器初始映射	控制器負(fù)載均衡	ILP和模擬退火算法	[34]
			控制延遲、控制器負(fù)載均衡和映射魯棒性	深度Q學(xué)習(xí)	[35]
			所需控制器數(shù)量	LP	[36]
	提升恢復(fù)效果	交換機(jī)-控制器重映射	控制器負(fù)載均衡和控制器失效概率	MILP和遺傳算法	[37]
			所需控制器數(shù)量	LP和啟發(fā)式算法	[38]
			流建立時(shí)間	MILP	[39]
			控制器交換機(jī)信息交換時(shí)長(zhǎng)	ILP	[40]
			負(fù)載變化和交換機(jī)遷移代價(jià)	MILP和啟發(fā)式算法	[41]
			控制器負(fù)載均衡和控制延遲	MILP和啟發(fā)式算法	[42]
			恢復(fù)流的數(shù)量	MILP和啟發(fā)式算法	[43]
		流-控制器重映射	可編程性均衡性、總體可編程和控制延遲	MILP和啟發(fā)式算法	[44]
		流-控制器重映射	可編程性均衡性、總體可編程性	MILP和啟發(fā)式算法	[45]

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