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IEICE TRANSACTIONS on Communications

Exploiting Packet-Level Parallelism of Packet Parsing for FPGA-Based Switches

Junnan LI, Biao HAN, Zhigang SUN, Tao LI, Xiaoyan WANG

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Summary :

FPGA-based switches are appealing nowadays due to the balance between hardware performance and software flexibility. Packet parser, as the foundational component of FPGA-based switches, is to identify and extract specific fields used in forwarding decisions, e.g., destination IP address. However, traditional parsers are too rigid to accommodate new protocols. In addition, FPGAs usually have a much lower clock frequency and fewer hardware resources, compared to ASICs. In this paper, we present PLANET, a programmable packet-level parallel parsing architecture for FPGA-based switches, to overcome these two limitations. First, PLANET has flexible programmability of updating parsing algorithms at run-time. Second, PLANET highly exploits parallelism inside packet parsing to compensate FPGA's low clock frequency and reduces resource consumption with one-block recycling design. We implemented PLANET on an FPGA-based switch prototype with well-integrated datacenter protocols. Evaluation results show that our design can parse packets at up to 100 Gbps, as well as maintain a relative low parsing latency and fewer hardware resources than existing proposals.

Publication
IEICE TRANSACTIONS on Communications Vol.E102-B No.9 pp.1862-1874
Publication Date
2019/09/01
Publicized
2019/03/18
Online ISSN
1745-1345
DOI
10.1587/transcom.2018EBP3333
Type of Manuscript
PAPER
Category
Transmission Systems and Transmission Equipment for Communications

Authors

Junnan LI
  National University of Defense Technology
Biao HAN
  National University of Defense Technology
Zhigang SUN
  National University of Defense Technology
Tao LI
  National University of Defense Technology
Xiaoyan WANG
  Ibaraki University

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