Performance analysis of IP datagram transmission delay in MPLS: impact of both number and bandwidth of LSPs of layer 2

摘要

LSR(Label Switching Router)in MPLS(Mul- tiprotocol Label Switching)networks map arriving IP flows into some labels on Layer 2 switching fabric and establish LSP(Label Switching Path)s. By using LSPs, LSRs not only transmit IP Datagrams fast by cut-through mechanism, but also solve traf- Fic engineering issue to optimize the delay of some IP datagram Flows. So far, we have analyzed the performance of LSR focusing Only on the maximum number of LSPs which can be set on Layer 2. In this paper, we will also consider the bandwidth allocated to each LSP and analyze the IP datagram transmission delay and the cut-through rate of LSR.