Black Box LE3700A-R2 manual Protocol Overview

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CHAPTER 5: Protocol Overview

5. Protocol Overview

The EPS supports 4 major protocols: NetWare, TCP/IP, AppleTalk (EtherTalk), and LAT. The 4 protocols provide varying support for printing, and each is discussed below.

For all 4 protocols: On the EPS, the term “service” denotes a printing resource that another node can access. Services must be attached to the EPS before a network node can access the print devices. You can disable certain protocols on a specific service. For example, you could prevent NetWare users from using the parallel port service. By default, there are 2 services on the EPS—one for the serial port and one for the parallel port. Normally, LAT is disabled on both services, while AppleTalk is disabled on the parallel port service. The explanations for these defaults are described in Sections 5.1 through 5.4.

TCP/IP is the only protocol that you need to configure with an explicit address. AppleTalk chooses an address dynamically, and LAT and NetWare use the server’s hardware address as the network address.

The protocols supported advertise themselves in different ways. For this reason, you may see a protocol that you don’t use coming from the EPS. For example, you might see a NetWare packet even though you only have AppleTalk traffic on your network. That’s because the EPS needs to:

1.Find any other nodes that might happen to start operation, and

2.Alert any other nodes that it will service these various protocols.

The EPS will do this regardless of whether it recognizes any hosts of that type on the network. In general, TCP/IP and AppleTalk will not generate any extra traffic, and respond only to queries from other nodes. NetWare and LAT will generate any occasional (every 10-120 seconds) packet to alert other nodes of the EPS’s presence. Also, the EPS will send an occasional NetWare broadcast to locate any other NetWare file servers. The EPS will also send a broadcast for the MOP (DECnet) remote console. You can eliminate some or all of these, since there will be no NetWare or LAT announcements if the protocol is not enabled on any of the EPS’s services. You cannot disable the MOP broadcasts, but they should only appear every 10 minutes.

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Contents Ethernet Print Server FCC Statement Ethernet Print Server NOM Statement Trademarks Used in this Manual Contents Contents Specifications Introduction DescriptionProtocols Supported Additional Software You May NeedEPS Configuration Printing from the host to the EPSIntroduction Installation EPS Network InstallationInstallation Print Server Screen Power-Up Troubleshooting How Do I Know It’s Working?Code in Flash ROMs is Corrupt Host Configuration NetWare Host ConfigurationAvailable Topics Menu Supervisor Options Menu Available Options Print Queue Information Print Server Information Menu TCP/IP Host Configuration 10. Print Server Info/Status ScreenTo the /etc/hosts file, AppleTalk Host Configuration Optional Rtel FunctionalityLAT Host Configuration Can also be set up as Troubleshooting the Printing Process Host Configuration Ethernet Print Server Protocol Overview NetWare TCP/IPAppleTalk LAT Protocol Overview EPS Configuration Server CharacteristicsPasswords EPS ConfigurationPort Characteristics Service SettingsEPS Configuration AppleTalk Configuration NetWare ConfigurationTCP/IP Configuration LAT Configuration Ethernet Print Server UNIX/RTEL Host Setup Reverse Telnet BackgroundEthernet Print Server Reverse Telnet for Unsupported Unix Machines Installing the Reverse Telnet SoftwareInstallation Procedure Setting up the Rtel Interfaces Creating Rtel Print Queues Queuename server Service Passwd options Deleting Rtel Print Queues Creating Rtel Pseudo-Devices Option Description UsageQueueing with the Rtel Software Rtel Troubleshooting Connecting to a Specific Port Using Telnet Appendix a RJ-45 Adapter Pinout RJ12 Or MMJAppendix a RJ-45 Adapter Pinout Appendix B Cable Limits Network/Cable LimitsSerial Cables Parallel CablesLED Patterns Appendix C Power-Up TestsConnections and Termination LED State Meaning Appendix C Power-Up Tests Appendix D Network Logins Appendix D Network Logins Appendix E Quick-Start Guide Appendix E Quick-Start Guide Ethernet Print Server Page Copyright 2002. Black Box Corporation. All rights reserved

LE3700A-R2 specifications

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