IMPLEMENTING EAPS IN THE METRO ETHERNET NETWORK

• Main Authors: Po-Chien Lin, 林柏堅
• Other Authors: Chienhua Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/57899721991137011071

碩士 === 大同大學 === 通訊工程研究所 === 98 === Ring topology is most often used in Metro Ethernets due to its ability to provide alternative path when network malfunctions. To prevent looping in the ring topology, either Ethernet Automatic Protection Switching (EAPS) or Rapid Spanning Tree Protocol (RSTP) must be used for Layer 2 redundant mechanism. Compared to RSTP, EAPS can achieve carrier-grade switching times and raise the network reliability. In this thesis, we connect several switches to emulate the operation of the Metro Ethernet and then experiment several tests involving link disconnection and equipment failure that might occurred in real networks. Both RSTP and EAPS are evaluated in our experiments. Our result shows that RSTP exhibits convergence times in order of seconds and might disconnect the whole network in some cases. Under the tests of different number of switches and different location of the master node, EAPS consistently performs better than RSTP in terms of convergence time. We also found that EAPS might fail as a result of a burst of ARP packets. This problem was reported to the switch vendor and has been solved by upgrading the switch firmware.