Patent ID: 8102760
Filing Date: 2012-01-24
Classification: H04L

Abstract:
1. A method for re-convergence after failure of a dual homing link, comprising: detecting a failure on a first dual homing port on a CE device; determining whether a port on the CE device is in the role of a BackupPort and in a blocking state; designating the second port on the CE device as a BackupPort and assigning a blocking state if it is determined that the second dual homing port is not a BackupPort in a blocking state; setting an operEdge variable to “true” upon one of determining that the second port is a BackupPort in a blocking state or assigning a blocking state to the second port; re-computing the role of each dual homing port on the CE device using an xSTP that maintains a value for the operEdge variable; and resetting, after completion of the role re-computation, the operEdge variable to “false”.