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The following sections present techniques that you can use when troubleshooting your WAN hardware:
Standalone test programs (DOS or NetWare version) might be supplied by a WAN board manufacturer for component and board level self-diagnostics.
A board diagnostic utility called SD.EXE is included with the Synchronous/+ board package. This utility can be used for troubleshooting when board problems occur. For more information about the SD diagnostic utility, refer to the Synchronous/+ Adapter Installation Guide .
A diagnostic program called WANDIAG.EXE is also provided on the distribution diskette received with the NW2000 board. WANDIAG.EXE is run from the DOS prompt and uses five different tests to test up to two boards.
If data is not sent, run the available hardware diagnostic tests on the WAN board. Change any settings and ensure that the board passes the hardware diagnostic tests.
CPECFG (Customer Premises Equipment Configuration), a NetWare Loadable ModuleTM (NLMTM ) utility installed on your router or server, provides expanded control of your data circuit-terminating equipment (DTE). You can now control customer premises equipment (if a supervisor port exists on the communications equipment) from any workstation on your internetwork through RCONSOLE, ACONSOLE, or VT100* XCONSOLE. This feature allows you to configure, control, and troubleshoot the DCE remotely from any workstation on the internetwork. A standard null modem cable is used from the router's serial port to the supervisory port or terminal on the DCE. Refer to the documentation provided with the DCE for more information.
Observe the following guidelines when using a DSU/CSU.
Perform back-to-back testing of all WAN interfaces before you install the router on-site. To implement a back-to-back test, complete the following steps:
Construct the appropriate crossover cable (as shown in Figure 3 , Figure 4 , or Figure 5 ) and attach it between the routing systems to be tested.
IMPORTANT: A modem eliminator can also be used in place of a crossover cable. When a modem eliminator is used, it provides the clocking. Configure the Line Speed option to External in NIASCFG (parameter path: Select Configure NIAS > Protocols and Routing > Network Interfaces > a specific interface). Because an incorrectly constructed crossover cable can cause problems that are difficult to isolate, we recommend using a modem eliminator.
Using NIASCFG, change the Line Speed option on one of the routers to an appropriate line speed (baud rate) other than External (parameter path: Select Configure NIAS > Protocols and Routing > Network Interfaces > a specific WAN interface).
On the other router, leave the speed setting to the default External and save both settings.
Configure any other needed IPX, TCP/IP, AppleTalk, or source route bridge parameters.
Restart both machines.
Use CALLMGR to initiate a call between the two routers.
Use MONITOR to verify that the connection is working properly. You can also load PING.NLM (TCP/IP) or IPXPING.NLM to verify connectivity.
NOTE: All crossover cables shown in Figure 1-1, Figure 1-2, and Figure 1-3 can be used with the Synchronous/+ board, but only the RS-232 and RS-422 cables can be used with the NW2000 board. Other WAN boards and drivers might require variations of these cables. Refer to your WAN board documentation for more information.
Figure 3 shows pinouts for constructing an RS-422 crossover cable, which can be used for back-to-back testing on any of the RS-422 ports.
Figure 3
RS-422 Crossover Cable
Figure 4 shows pinouts for constructing a V.35 crossover cable, which can be used for back-to-back testing on any of the V.35 ports.
Figure 4
V.35 Crossover Cable
Figure 5 shows pinouts for constructing an RS-232 crossover cable, which can be used for back-to-back testing on any of the RS-232 ports.
Figure 5
RS-232 Crossover Cable
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