Original sentence: Multicast was, for the most part, an afterthought in MPLS design.The hub and spoke multipoint LSP (HSMP LSP) was also introduced by IETF
Edited sentence: Multicast was, for the most part, an after-thought in MPLS design.Since the inception of  there has been a tremendous surge in interest and deployment of MPLS multicast and this has led to several new developments both in the IETF and in shipping products.The hub&spoke multipoint LSP is also introduced by IETF, short as HSMP LSP