A lightweight implementation of RSVP-TE protocol for MPLS-TE signaling

Authors:
Young Woo Lee;Suncheul Kim;Jaehyung Park;Sang Ha Kim
Affiliations:
Operations Support System Laboratory, KT, 463-1, Jeonmin-dong, Yusong-gu, Daejeon 305-811, Republic of Korea;Broadband Converged Network Research Division, ETRI, 162 Gajeong-dong, Yusong-gu, Daejeon 305-350, Republic of Korea;Department of Computer and Information Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea;Department of Computer Engineering, Chungnam National University, 200, Kung-dong, Yusong-gu, Daejeon 305-764, Republic of Korea
Venue:
Computer Communications
Year:
2007

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Abstract

Traffic engineering based on an MPLS technology is being introduced for providing high quality-guaranteed services over the Internet. As one of MPLS signaling protocols for traffic engineering, a RSVP-TE protocol transmits and receives periodic refresh messages for maintaining the connection state of a flow-based path. Such a soft state characteristic gives a heavy processing overhead to routers for maintaining connection states in case of being a large number of paths established. In this paper, we propose a lightweight implementation approach of a RSVP-TE protocol reducing processing overhead on periodic messages by adapting the Hello mechanism. We evaluate the processing overhead of the implemented lightweight RSVP-TE protocol compared with the refresh reduction scheme. Our evaluation results show that the proposed RSVP-TE protocol can manage a large number of LSP states without increasing overhead of refresh messages.