Digital Subscriber Line Access Multiplexer (DSLAM) Example Design

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Digital Subscriber Line Access Multiplexer (DSLAM) Example Design }; 5.0 Project Configuration / Modifying the Example Design This example design can be assembled with a variety of options, all of which are configurable in the header files: project_config.h and system_config.h. 6.0 Testing Environment The testing environment is the same as the execution environment - for details refer to Section 1.3 of this document. 7.0 Simulation Support (Scripts, etc.) The three Developer WorkBench projects in this design can be run using the simulator within the DWB. Test streams, foreign model DLLs, and the simulator scripts that support them, can be used to exercise the projects by providing various network traffic inputs to the WorkBench applications. 7.1 Simulation for the Receive Processor Project 7.1.1 Initialization Scripts The file dslam_proc_a.ind is the primary initialization script for the Receive Processor project. It invokes all other simulator scripts, including the dslam_perf_proc_a.ind script and the test case scripts described below. The primary functions performed by this script are: • Memory Map Initialization • Queue Descriptor Table Initialization • Scratch Memory Initialization • SRAM Task Message Area Initialization • Scratch Task Message Area Initialization • Fast Port Index Initialization in the Queue Descriptor Table • Route Table Manager Initialization • Hash Table Manager Initialization • Route Additions to the Route Table • Invocation of a Selected Test Case Script • Start of Packet Reception 32 Application Note
Digital Subscriber Line Access Multiplexer (DSLAM) Example Design 7.1.2 Test Case Scripts Table 2. The first nine of ten test cases for the Receive Processor project can be executed using either NetworkTraffic.dll or NetSim.dll. The tenth test case (which simulates pass-through of flow control packets) must be executed using NetworkTraffic.dll. (At the time of this writing, NetSim.dll did not support simulation of flow control packets.) To switch between the use of NetworkTraffic.dll and NetSim.dll, the .dll file must be specified in the WorkBench under Simulation/IX Bus Device Simulator/Port I/O. The following table shows the test case descriptions and the associated script files which must be specified through the initialization script file, dslam_proc_a.ind. Test Case Descriptions and their Files Test Case Description NetworkTraffic.dll (all file names start with: dslam_proc_a_ ) NetSim.dll (all file names start with: dslam_proc_a_ ) NetSim TCS File (all file names start with: dslam_proc_a_ ) 001 Vary Physical Port test_case_001.ind test_case_001_netsim.ind test_case_001.tcs 002 Vary VP/VC test_case_002.ind test_case_002_netsim.ind test_case_002.tcs 003 Vary IP test_case_003.ind test_case_003_netsim.ind test_case_003.tcs 004 005 006 007 008 Minimum Packet Maximum Packet Medium Packet IP LPM Lookup IP 5-Tuple Lookup test_case_004.ind test_case_004_netsim.ind test_case_004.tcs test_case_005.ind test_case_005_netsim.ind test_case_005.tcs test_case_006.ind test_case_006_netsim.ind test_case_006.tcs test_case_007.ind test_case_007_netsim.ind test_case_007.tcs test_case_008.ind unsupported unsupported 009 MPoA Encapsulation test_case_009.ind test_case_009_netsim.ind test_case_009.tcs 010 Flow Control test_case_010.ind unsupported unsupported Each of the above scripts performs the following functions: • Initialization of Either NetworkTraffic.dll or NetSim.dll • Addition of Entries to the Connection Table, Including VPI, VCI, and Network Model • Generation of ATM Frames for Simulated Input (for use with NetworkTraffic.dll) • Generation of ATM Frames for Simulated Input from a NetSim Traffic Configuration Specification (.tcs) file (for use with NetSim.dll) • Setup of 5-Tuple Rules for IP Route Lookup Using the 5-Tuple Lookup Algorithm Application Note 33
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Page 3 and 4: Contents Contents 1.0 Introduction
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