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NS 3000/iX Operations & Maintenance Reference Manual: HP 3000 MPE/iX Computer Systems > Chapter 2 Operating Your Network ![]() Verifying Network Connections and Services |
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Several line verification tests are available to help you verify the operation of NS 3000/iX services and link products. NSLOGON establishes temporary connections to other nodes to verify that the network transport is operating correctly between the two nodes using the connection. XPVAL is an interactive test that uses the NetIPC intrinsics to make sure that the network transport is working correctly. QVALNS and NSTEST both perform a quick validation of the Network Services. QVALNS runs through a job while NSTEST runs interactively. You can run all of these tests either standalone or through the NETTOOL utility. Hewlett-Packard suggests that you run them through the NETTOOL utility to take advantage of its facilities, including online help. Perform the following steps to use XPVAL to check the network transport. (Note that you may also use NSLOGON to establish a temporary connection between nodes to check the network services. See Chapter 6 “Using NETTOOL ” for more information.)
Error messages for the XPVAL line tests appear in inverse video at the system console. Some errors allow the test to continue, so they may scroll off the top of the terminal screen. Copy the error message information for further diagnosis. Errors from the XPVAL line tests fall into the following categories:
Packet verification errors indicate problems with either the packet size or the character received. Packet Verification Errors will not abort the XPVAL line tests. Their error messages may scroll off the top of the console terminal screen, preceding a "TCP TEST FAILED"s or console message. Packet verification errors are listed below:
However if errors continue for each packet, check surrounding errors, then rerun the test. If problems continue, see Appendix B “Submitting an SR ” Most Send and Receive failures are timing-related. They usually do not abort the tests. Listed below are the Send and Receive failures which do not abort the tests:
Note the location in the program where the error occurred. For each error, examine the SOCKERR numbers and the Protocol Module numbers returned. Save the error information. Follow the "Actions" for the Protocol Module or NetIPC SOCKERRs, both listed in the NS 3000/iX Error Messages Reference Manual. Socket creation failures and Network IPC Connection errors cause a test to terminate. Listed below are Socket Errors which abort the tests:
Following these errors on the console screen are a SOCKERR and a Protocol Module error. Copy the error messages on the user and system console terminals. Follow the "Action" for the SOCKERR and PM errors, respectively listed in "Network Interprocess Communication Errors" and "Network Transport Protocol Errors" in the NS 3000/iX Error Messages Reference Manual. The XPVAL software line tests enable checksum in the TCP protocol of the network transport subsystem. "Checksum" errors may be returned to either console. If "Checksum" errors appear along with "Send and Receive failures" listed above, then your system may have hardware link problems; see "Investigating the Link" in the NS 3000/iX Error Messages Reference Manual. Certain errors may appear in all software line tests which do not fit in the categories described above. They are listed here.
If the following SOCKERRs appear together, then the network may be "too busy"—that is, coordinating too many processes—to permit proper operation of the XPVAL tests:
Wait until network activity lessens to execute the tests. Examine the Protocol Module errors regarding the TCP entity. Protocol Module errors are listed in the "Network Transport Protocol Errors" table in the NS 3000/iX Error Messages Reference Manual. Perform the following steps to use QVALNS to check the Network Services. The services tested are VT, RFA, NFT, RPM, and RDBA. (Note that it is not possible to use passwords with QVALNS. If passwords are required, run NSTEST instead.)
Perform the following steps to use NSTEST to check the Network Services. It is possible to use passwords with this test.
To test RDBA, the data base RDBAT must reside in the home group of the remote system. This is not a problem when you run QVALNS, because that program creates the database and then purges it when it finishes. If you want to test RDBA using NSTEST, perform the following steps.
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