Autodesk COMBUSTION-4 Network Guide - Page 12

2 Network Planning Concepts • Since the redundant server model is more susceptible to network failure, all servers must reside on the same subnet and have consistent network communications. All servers must be located on the same site. • Slow, erratic, or dial-up connections are not recommended when using the redundant server model. • The redundant server model does not support the UDP packet type. To create a redundant server pool, run the AdLM installation on the initial server you want to configure, then repeat the AdLM installation for the other two servers. To get proper license authorization, you must obtain the Host ID and server name for each server in the redundant server pool before contacting Autodesk. For additional information, see "Obtaining the Server Host Name and ID" in Chapter 4, "License Server Configuration''. Once all client workstations are installed and communicating with the license server, you must modify the combustion.lic file on each client workstation to include server information for each of the three servers. Following is an example of the contents of the combustion.lic file: SERVER PC54321 210987654321 USE_SERVER Following is an example of a combustion.lic file modified for a redundant server operation: SERVER PC54321 210987654321 27005 SERVER PC12345 123456789012 27005 SERVER PC32154 321543210981 27005 USE_SERVER The redundant server model requires a port number (the default is 27005) for each server. The port number at the end of each SERVER line must also be included in the license file for the redundant server model only. The redundant server model requires Windows 2000 Server Edition. Note: Windows 2000 Workstation edition is not supported as license servers. The redundant server model also requires that separate copies of the same license file, license manager daemon (lmgrd), and vendor daemon reside on each server; all are necessary to authenticate and release licenses. If the redundant server configuration fails, it might be necessary for the system administrator to start the license server on each of the redundant server machines within a few minutes of one another. AdLM Network Communication Protocol Once you have chosen your preferred installation configuration, you have the option of using either the TCP/IP or UDP packet types. The AdLM uses the standard network protocol-Transport Control Protocol/Internet Protocol (TCP/IP) packets by default. TCP sends data between applications whereas IP communicates data between an application and the physical network. There is a 10-connection TCP/IP limit with Windows 2000/Windows XP Professional editions. The Windows 2000 and Windows XP Server editions do not have the 10-connection limitation, so they are the preferred Operating systems. If you have more than 10 client workstations that need to access a single license server and you do not have a Server edition of Windows, then use UDP as the default packet type. UDP requires more extensive configuration at servers and clients. 8