This paper discusses this problem in detail and gives a method to avoid forming loops in extended LSP.The network resources can be saved and the packet delay can be decreased by this method.

• 本文首先对扩展LSP可能存在环路的问题作了详细分析，然后给出了一种新的LSP扩展的环路消除技术，以避免在扩展的LSP上出现环路，从而达到节省网络资源，减小分组的时延的目的。