180TCP/IP TroubleshootingUse the following check list to troubleshoot your network communication problem.Check Physical Media and Network Interface Cards1. Verify that the Device is powered ON.2. Verify that the Device and Workstation are using the correct cabling to communicate over the network.Use category 3 UTP patch (NOT crossover) cable for 10 Base T communications, category 5 UTPpatch (NOT crossover) cable for 10 Base T / 100 Base TX communications, and Token Ring cablingfor Token Ring networks.3. Verify that the cable at both the Device and Workstation is fully plugged into the Network InterfaceCard (NIC). Check the link light, which is typically a green LED, to make sure that it is lit. Typically, butnot always, a second light on the Network Interface Card will be intermittently flashing, indicating thepresence of network traffic. If neither of these lights is lit, there is a problem with the NIC.Print a Configuration Report at the Device and perform these tasks:1. Under the Ethernet Rated Speed data label on the List, verify that your communications speed iscorrectly set for your network and that you have a MAC address listed. The driver for your NIC worksat the Media Access Control (MAC) layer of the protocol stack. If no MAC address is shown, you haveeither a bad NIC or no NIC at all. Replace or install the Network Interface Card.2. Under the TCP/IP data label, determine the method being used to assign TCP/IP addressing to theDevice. Specifically note the Mode being used. IP version 4 is the traditional mode using addressformats of xxx.xxx.xxx.xxx. Verify that the IP Address, Subnet Mask, and Gateway addresses arecorrect for your network and have NOT changed from their previous settings. Note: The use of DHCP(the DHCP Server) with a short "lease" time can cause the Device to be assigned a new IP Addresswhen it is powered off for an extended period of time. This will interrupt communications withworkstations using the "old" IP address. If you do not want the IP address to be subject to constantchanges, either increase the lease time at the DHCP Server, or use the Static IP Addressing methodas described in the TCP/IP Protocol Configuration procedure in the NOS selection section of thisguide.3. Under the LPD data label, if you are communicating with the Device through an LPR port, make surethat LPD is Enabled. If it is NOT, enable it following the instructions supplied in this guide under TCP/IP LPD Enablement. Also verify that the displayed port number is "515." If it is NOT, set it to "515"using the instructions supplied in the Configure LPD procedure in the Internet Services section of thisguide.4. Under the Port 9100 data label, to enable the Device to automatically determine the Page DescriptionLanguage to use in processing jobs sent over the workstation's LPR port, make sure that this Port isenabled. This is the meaning of the word "raw" when used to name the queue during LPR portcreation. Follow the instructions supplied in the Configure Port 9100 (Raw Printing) procedure in theNOS Selection section of this guide.5. Under the CentreWare Internet Services data label, verify that this feature is Enabled. If it is NOT,enable it following the instructions supplied in the Network Connectivity section of this guide.
