Currently it is actively driven to worldwide deployment.Some foreign organizations pay much attention to the testing of LDP protocol ,which is one of signalling protocols of MPLS.

• 标记分发协议LDP是MPLS最基本的信令协议，国外十分重视对它的测试，已有多个测试机构和测试系统生产厂家声称能够对LDP协议进行多方面的测试。