METHOD FOR ALLOCATING GLOBAL LABEL, METHOD FOR ACQUIRING GLOBAL LABEL AND RELATED DEVICE

摘要

Provided is a method for allocating a global label, comprising: a controller receiving a first message sent by a forwarding device, wherein the first message carries a first label range, a plurality of labels included in the first label range are a subset of a plurality of labels included in a label space of the forwarding device, and the first label range is not equal to the label space of the forwarding device; and the controller allocating a global label to the forwarding device according to the first label range carried in the first message, wherein the global label is a label in the first label range.In addition, also provided are a method for acquiring a global label, a controller and a forwarding device.The above-mentioned solution can help to increase the efficiency of global label allocation.