METHOD FOR PROTECTION AGAINST SUPERLOOPS IN AN ETHERNET RING

摘要

The present invention relates to a method in an interface node for protecting an Ethernet ring from a superloop going through the Ethernet ring, wherein the Ethernet ring comprises a pair of interface nodes between the Ethernet ring and a VPLS-domain, the method comprising the steps of: receiving in the interface node a priority message indicating a priority level for each Ethernet ring connected to the VPLS-domain; receiving in the interface node a withdrawal message intended to indicate that the other interface node is malfunctioning; and transmitting from the interface node a signal failure message to the Ethernet ring in a case any other Ethernet rings has a lower priority level than said Ethernet ring.