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.

主权项

1. A method for Ethernet loopback detection, the method comprising:
snooping an egress frame at a network element, wherein the network element is an edge device of a user network interface in a service provider network, the network element coupled to a customer network at the user network interface; storing a first media access controller (MAC) address from a first source field of the egress frame; monitoring an ingress frame received from the customer network, wherein a second MAC address in the first source field of the ingress frame is compared with the first MAC address; and when the second MAC address matches the first MAC address, dropping the ingress frame.