A congestion-avoidance scheme for LAN interconnection over high-speed networks

  • Authors:
  • Hossam S. Hassanein

  • Affiliations:
  • Department of Mathematics and Computer Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait

  • Venue:
  • Computer Communications
  • Year:
  • 1997

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Abstract

Organizations engaged in distributed computing have made a substantial investment in local area networks (LANs) (e.g., Ethernet, token rings and FDDIs). The number of connected servers and workstations, as well as their corresponding storage and service devices, are rapidly increasing. This leads to a substantial increase in LAN traffic, making current LAN interconnection technology ineffective. High-speed backbone networks may offer the suitable interconnecting media for LANs supporting traffic-intensive applications. However, the interconnection of dissimilar LANs and devices over a high-speed backbone network can create congestion at a destination LAN (output) gateway when more than one device or LAN attempt is made to communicate simultaneously with the same device or LAN. We address the issue of congestion avoidance in LANs interconnected by a high-speed backbone. A congestion-avoidance scheme that requires input gateways to secure permits to the output gateway before transmitting is proposed. An implementation of the proposed congestion-avoidance scheme in an asynchronous transfer mode switch is shown. Performance results indicate that packet dropping rates are greatly reduced.