Research And Implemenation Of Label Switching Path Switching Strategy Based On P2MP Protocol

Multi-protocol label switching is an important system proposed to ensure network stability and improve network efficiency.Its core content is to use label for data forwarding.Label distribution protocol is an important protocol in multi-protocol label switching,it details the process of establishing a label switching path.As the network becomes more complex,the traditional P2P label switching path has problems such as low forwarding efficiency,but the label switching path of the P2MP protocol improves the forwarding efficiency through the idea of multicast.Despite this,there are many problems in the switching process of the P2MP protocol label switching path,which includes the problem of excessive consumption of resources due to excessive number of switching times in the route flapping scenario,and traffic loss and resource occupation caused by loss of notification in the scenario of waiting for notification.The main research contents of this paper are as follows:(1)For the above-mentioned route flapping scenario,this paper proposes a corresponding route flapping switching model,which clarifies that the obj ective function is the minimum value of the resource consumption rate.At the same time,a delay switching strategy is proposed to reduce the additional consumption rate of resources,the idea of label reuse,hash storage,etc.is proposed for the delay switching strategy,and the delay switching strategy is improved.(2)For the above-mentioned waiting notification scenario,this paper establishes a notification loss probability model to prove that a large number of notifications are lost in a complex network environment,and contrast constraint switching advance response strategy and make before break advanced response strategy.(3)In order to successfully carry out experiments on the above two scenarios,this paper implements the P2MP-LDP path switching prototype system based on the LDP system under the open source quagga.Based on the system,an experiment is performed on the route flapping scenario and the waiting notification scenario,and the experimental analysis is performed.After the experiment in the route flapping scenario,it can be proved that for a specific network topology,the delay switching strategy reduces the additional consumption rate of the label resource,and reduces the number of label mapping messages sent,that is,reduces resource consumption.At the same time,as the network environment becomes more complicated,the delay switching strategy has more significant effects than the ordinary switching strategy.After the experiment in the waiting notification scenario,it can be proved that as the number of network nodes increases,the probability of losing the notification is greater.After a comparison experiment between constraint switching advanced response algorithm and make before break advanced response strategy,it can be proved that the constraint switching advance response strategy reduces the switching delay on the basis of reducing traffic loss.