ETHERNET LOOPBACK DETECTION AND SERVICE TRAFFIC BLOCKING

摘要

A method and system for Ethernet loopback detection snoops an egress frame at a UNI-N edge device and records at least one source field of the egress frame, such as a MAC address or a VLAN tag. Ingress frames at the UNI-N edge device are monitored for having the same value in the source field as the egress frame. When an ingress frame has the same source field value as the egress frame, the ingress frame is identified as a loopback frame and is dropped at the UNI-N edge device.