Ethernet loopback detection and service traffic blocking
AssigneeFujitsu Limited
InventorsStephen John Unger, Frank Schumeg
Life of this patent
Estimating the term…
Abstract
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.
Claims14
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.
A network element for Ethernet loopback detection, the network element comprising:
- a processor;
- non-transitory computer readable memory media accessible to the processor, 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, and
- wherein the memory media store processor-executable instructions, the instructions, when executed by the processor, cause the processor to:
- snoop an egress frame intended for the customer network;
- store a first media access controller (MAC) address from a first source field of the egress frame;
- monitor 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, drop the ingress frame.
Dependencies are inferred from the claim text.