IEICE TRANSACTIONS on Communications
A New TCAM Architecture for Managing ACL in Routers
Summary :
Ternary Content Addressable Memory (TCAM) is a special type of memory used in routers to achieve high-speed packet forwarding and classification. Packet forwarding is done by referring to the rules written in the routing table, whereas packet classification is performed by referring to the rules in the Access Control List (ACL). TCAM uses more transistors than Random Access Memory (RAM), resulting in high power consumption and high production cost. Therefore, it is necessary to reduce the entries written in the TCAM to reduce the transistor count. In this paper, we propose a new TCAM architecture by using Range Matching Devices (RMD) integrated within the TCAM's control logic with an optimized prefix expansion algorithm. The proposed method reduces the number of entries required to express ACL rules, especially when specifying port ranges. With less than 10 RMDs, the total number of lines required to write port ranges in the TCAM can be reduced to approximately 50%.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E93-B No.11 pp.3004-3012
- Publication Date
- 2010/11/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E93.B.3004
- Type of Manuscript
- PAPER
- Category
- Network
Authors
Keyword
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Haesung HWANG, Shingo ATA, Koji YAMAMOTO, Kazunari INOUE, Masayuki MURATA, "A New TCAM Architecture for Managing ACL in Routers" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 11, pp. 3004-3012, November 2010, doi: 10.1587/transcom.E93.B.3004.
Abstract: Ternary Content Addressable Memory (TCAM) is a special type of memory used in routers to achieve high-speed packet forwarding and classification. Packet forwarding is done by referring to the rules written in the routing table, whereas packet classification is performed by referring to the rules in the Access Control List (ACL). TCAM uses more transistors than Random Access Memory (RAM), resulting in high power consumption and high production cost. Therefore, it is necessary to reduce the entries written in the TCAM to reduce the transistor count. In this paper, we propose a new TCAM architecture by using Range Matching Devices (RMD) integrated within the TCAM's control logic with an optimized prefix expansion algorithm. The proposed method reduces the number of entries required to express ACL rules, especially when specifying port ranges. With less than 10 RMDs, the total number of lines required to write port ranges in the TCAM can be reduced to approximately 50%.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.3004/_p
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@ARTICLE{e93-b_11_3004,
author={Haesung HWANG, Shingo ATA, Koji YAMAMOTO, Kazunari INOUE, Masayuki MURATA, },
journal={IEICE TRANSACTIONS on Communications},
title={A New TCAM Architecture for Managing ACL in Routers},
year={2010},
volume={E93-B},
number={11},
pages={3004-3012},
abstract={Ternary Content Addressable Memory (TCAM) is a special type of memory used in routers to achieve high-speed packet forwarding and classification. Packet forwarding is done by referring to the rules written in the routing table, whereas packet classification is performed by referring to the rules in the Access Control List (ACL). TCAM uses more transistors than Random Access Memory (RAM), resulting in high power consumption and high production cost. Therefore, it is necessary to reduce the entries written in the TCAM to reduce the transistor count. In this paper, we propose a new TCAM architecture by using Range Matching Devices (RMD) integrated within the TCAM's control logic with an optimized prefix expansion algorithm. The proposed method reduces the number of entries required to express ACL rules, especially when specifying port ranges. With less than 10 RMDs, the total number of lines required to write port ranges in the TCAM can be reduced to approximately 50%.},
keywords={},
doi={10.1587/transcom.E93.B.3004},
ISSN={1745-1345},
month={November},}
Copy
TY - JOUR
TI - A New TCAM Architecture for Managing ACL in Routers
T2 - IEICE TRANSACTIONS on Communications
SP - 3004
EP - 3012
AU - Haesung HWANG
AU - Shingo ATA
AU - Koji YAMAMOTO
AU - Kazunari INOUE
AU - Masayuki MURATA
PY - 2010
DO - 10.1587/transcom.E93.B.3004
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2010
AB - Ternary Content Addressable Memory (TCAM) is a special type of memory used in routers to achieve high-speed packet forwarding and classification. Packet forwarding is done by referring to the rules written in the routing table, whereas packet classification is performed by referring to the rules in the Access Control List (ACL). TCAM uses more transistors than Random Access Memory (RAM), resulting in high power consumption and high production cost. Therefore, it is necessary to reduce the entries written in the TCAM to reduce the transistor count. In this paper, we propose a new TCAM architecture by using Range Matching Devices (RMD) integrated within the TCAM's control logic with an optimized prefix expansion algorithm. The proposed method reduces the number of entries required to express ACL rules, especially when specifying port ranges. With less than 10 RMDs, the total number of lines required to write port ranges in the TCAM can be reduced to approximately 50%.
ER -
English
