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Paper Abstract and Keywords
Presentation 2026-03-17 09:20
An Initial Study on the Design of an IPv6 Destination Lookup Cache for Routers
Kiya Munemura, Yuzuki Tsuji, Shinobu Miwa, Hiroki Honda, Hayato Yamaki (UEC) CPSY2025-70 DC2025-142
Abstract (in Japanese) (See Japanese page) 
(in English) Recent years, the rapid increase in IPv6 usage among ISPs has led to a significant rise in the processing load of IPv6 destination lookups in routers. While extensive studies have investigated hardware destination-lookup caches for IPv4 in terms of cache capacity, organization, and replacement policies, similar evaluations for IPv6 remain limited. In particular, the cache capacity and configuration required for recent real-world traffic, as well as the achievable performance, have not been sufficiently clarified.
As an initial study, we analyze and evaluate a destination-lookup cache that stores 128-bit IPv6 addresses through simulation using real traffic trace data, focusing on the relationship between memory capacity/configuration and performance. Specifically, we examine a direct-mapped cache and a 4-way set-associative cache with replacement policies of LRU, FIFO, and LFU. We also compare index computation methods based on CRC-32, the Fletcher checksum, and a simple modulo operation. The cache designs are evaluated in terms of hit rate, throughput, and power consumption.
The results show that throughput increases with cache capacity up to a certain point and reaches its maximum at 2 MiB. Furthermore, the comparison indicates that a 2 MiB 4-way LRU cache using either CRC-32 or the Fletcher checksum provides the best overall configuration. In this configuration, the worst-case hit rate, throughput, and power consumption are 95.61%, 846.7 Gbps, and 922.6 mW, respectively.
Keyword (in Japanese) (See Japanese page) 
(in English) IPv6 / routing / cache / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 401, CPSY2025-70, pp. 107-112, March 2026.
Paper # CPSY2025-70 
Date of Issue 2026-03-08 (CPSY, DC) 
ISSN 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 CPSY2025-70 DC2025-142

Conference Information
Committee DC CPSY IPSJ-SLDM IPSJ-EMB IPSJ-ARC  
Conference Date 2026-03-15 - 2026-03-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Sun-Olive Olive Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ETNET2026 
Paper Information
Registration To CPSY 
Conference Code 2026-03-DC-CPSY-SLDM-EMB-ARC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Initial Study on the Design of an IPv6 Destination Lookup Cache for Routers 
Sub Title (in English)  
Keyword(1) IPv6  
Keyword(2) routing  
Keyword(3) cache  
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1st Author's Name Kiya Munemura  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Yuzuki Tsuji  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Shinobu Miwa  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Hiroki Honda  
4th Author's Affiliation The University of Electro-Communications (UEC)
5th Author's Name Hayato Yamaki  
5th Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2026-03-17 09:20:00 
Presentation Time 20 minutes 
Registration for CPSY 
Paper # CPSY2025-70, DC2025-142 
Volume (vol) vol.125 
Number (no) no.401(CPSY), no.402(DC) 
Page pp.107-112 
#Pages 6 
Date of Issue 2026-03-08 (CPSY, DC) 

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