关键词: 汇聚分担, 以太网汇聚, 虚拟局域网, 组网方式

Abstract: During daily maintenance, the main and standby channels of transmitting Ethernet aggregation services such as infrared ray, traction and electric power on Tang-Bao line have been completely interrupted for several times, and there is no troubleshooting, locating and recovery method available on the user side. It requires to locate the fault point by transmission network and data network, which has high professional requirements for maintenance personnel, complicated operation of network administrator, long troubleshooting time and wide impact range, and endangers the normal application of railway train operation and exists great hidden safety risks. This paper discusses that by optimizing the networking structure of the transmitting Ethernet aggregation service, the main and standby channels of the transmitting Ethernet aggregation service can be prevented from totally interrupted, the number of faults and the impact range can be reduced, the fault location can be quickly located in the event of a fault and the network administrator can easy to operate. Thus, the security and reliability of the railway transmitting Ethernet aggregation service can be effectively improved.

Key words: aggregation sharing, Ethernet aggregation, VLAN, networking mode