tailieunhanh - Overview of MPLS networks simulator : design and implementation

Tài liệu tham khảo và Tổng quan về mô phỏng mạng MPLS | Overview ofMPLS Network Simulator Design and Implementation Gaeil Ahn and Woojik Chun Department of Computer Engineering Chungnam National University Korea fogl chun @ Table of Contents 1. Introduction 2. Architecture ofMPLS Node 3. APIs for LDP and CR-LDP 4. Creating a MPLS Network with MNS 1. Example 1 Simulating a basic MPLS functions 2. ExperimentResults ofExample 1 5. Conclusion 1. Introduction The MPLS network simulator MNS has been implemented by extending Network Simulator NS . MNS has been implemented on Sun Unix system extending program NS version . To get the source program example files manual and install guide of MNS click here. Download of MNS program executed on program The primary purpose of this work is to develop a simulator that enables to simulate various MPLS applications without constructing a real MPLS network. The implementation scope of MPLS simulator is as follows MPLS Packet switching label swapping operation TTL decrement and penultimate hop popping LDP -- handling LDP messages Request Mapping Withdraw Release and Notification CR-LDP -- handling CR-LDP messages Request and Mapping The capability of MPLS simulator related to setting up LSP is as follows In LSP Trigger Strategy -- support control-driven and data-driven trigger. In Label Allocation and Distribution Scheme support only downstream scheme in control-driven trigger and both upstream and downstream-on-demand scheme in data-driven trigger. In Label Distribution Control Mode support only independent mode in control-driven trigger and both independent and ordered mode in data-driven trigger. In Label Retention Mode support only conservative mode. ER-LSP based on CR-LDP -- established based on the path information pre-defined by user. Plow Aggregation aggregate fine flows into a coarse flow 2. Architecture of MPLS Node MNS is extended from NS that is an IP based simulator. In NS a node consists of agents and classifiers. An agent is the sender .