Abstract
A Bridged Local Area Network (BLAN) is an internetwork where a lot of LANs are interconnected by bridges. The bridge plays an important role in the network especially when interconnecting between ATM network and legacy LANs. It makes the communication between ATM and legacy LANs possible. The basic operations of a bridge include: addresses learning, frames forwarding, and frames filtering. Besides, for resolving the loop problem in a BLAN topology, it also implements Spanning Tree Protocol (STP). For an ATM bridge, the LAN Emulation (LE) service function is also necessary to be implemented. In this thesis, a practical PC-based LAN Emulation Tester is designed and implemented to test LAN Emulation functions in the ATM/Ethernet bridge. A user friendly BLAN editor is also given for the users to design various BLAN topologies for testing. For extending to be an ATM Bridge Tester, the testing concepts of the bridge basic operations are also introduced and included in this thesis. Some SNMP Agent functions and the standard bridge MIBs are also included.