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Paper Abstract and Keywords
Presentation 2010-05-14 10:55
A proposal of L2 loop detection method with path-marking technique
Satoshi Narikawa, Kazuhiro Okura, Hiroshi Uno (NTT) ICM2010-5
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes the Layer (L2) loop detection method with a path-marking technique. An arise of infinite loop in L2 network causes not only excess consumptions of network resources, such as transmission bandwidth and frame switching capability, but also a long service break with huge negative impacts on service assurance in the worst cases. So, operators of Carrier Ethernet have put importance on the establishment of infinite loop countermeasure. In one of conventional methods, infinite loop can be detected when one of the ports of a switch in L2 network receives the loop detection frame that was previously sent from the same switch. However, the conventional methods are only able to notify the occurrence of an infinite loop in a L2 network, and are not able to provide any location information about the subset of the network or the group of the switches, where the network falls into an infinite loop. This information is necessary to find out the causes of the loop and is crucial for the rapid recovery from the incident. To solve this problem, this paper proposes the use of a new path-marking technique for the loop detection that can automatically identify the group of switches where the causes of the loop exist. In addition, this paper reports the algorithm of the proposed method, an implementation design example of it, and the proposed method’s superiority over the conventional methods. Also, it is reported that although the implementation of the proposed method needs to add a new function on all switches in L2 trunk network, the function can be implemented by relatively low cost, such as single times of operations on an internal table.
Keyword (in Japanese) (See Japanese page) 
(in English) Carrier Ethernet / Layer2 network / loop countermeasure / operation and maintenance / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 24, ICM2010-5, pp. 69-74, May 2010.
Paper # ICM2010-5 
Date of Issue 2010-05-06 (ICM) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ICM2010-5

Conference Information
Committee ICM IPSJ-IOT  
Conference Date 2010-05-13 - 2010-05-14 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ICM 
Conference Code 2010-05-ICM-IOT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A proposal of L2 loop detection method with path-marking technique 
Sub Title (in English)  
Keyword(1) Carrier Ethernet  
Keyword(2) Layer2 network  
Keyword(3) loop countermeasure  
Keyword(4) operation and maintenance  
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1st Author's Name Satoshi Narikawa  
1st Author's Affiliation NTT (NTT)
2nd Author's Name Kazuhiro Okura  
2nd Author's Affiliation NTT (NTT)
3rd Author's Name Hiroshi Uno  
3rd Author's Affiliation NTT (NTT)
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Speaker Author-1 
Date Time 2010-05-14 10:55:00 
Presentation Time 25 minutes 
Registration for ICM 
Paper # ICM2010-5 
Volume (vol) vol.110 
Number (no) no.24 
Page pp.69-74 
#Pages 6 
Date of Issue 2010-05-06 (ICM) 

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