HP-UX LAN Administrator's Guide (Feburary 2007)

DRAFT COPY Troubleshooting HP-UX LAN
Diagnostic Flowcharts
Chapter 5 73
Flowchart 7 Procedures
A. Execute: linkloop or nwmgr --diag on local interface. Execute the linkloop
or nwmgr --diag command with the station address of the local interface.
Execute lanscan or nwmgr to find the link level address (station address) on
the remote host or obtain it from your network map. For more information,
refer to the linkloop(1M) or nwmgr(1M) man page.
B. successful? If not, your LAN card may not be operational. Go to Flowchart 8.
C. Execute: linkloop or nwmgr --diag to remote host. Enter the link level
address (station address) of the remote host.
D. successful? If the test was successful, stop. Network connectivity is okay
through the Link Layer (OSI Layer 2). If not successful, note which error
was returned and continue with this flowchart.
E. Loopback failed; Address has bad format. The link level address is not
correct. Go to H.
F. Loopback failed; Not an individual address. The link level address is not
correct. The second hexadecimal digit is odd. This means it is a multicast or
broadcast address, which is not allowed. The address must be unique to one
remote host. Go to H.
G. Loopback failed. The remote host did not respond. Go to I.
H. Correct the link address parameter. Change the link level address to an
allowed value and go to C.
I. Choose a different IEEE 802.3 host; re-execute linkloop or nwmgr --diag.
Restart this flowchart using a different remote host. NOTE: Make sure the
remote host is an HP Server and try again.
J. successful? If the test was successful, stop. Network connectivity is okay
through the Link Layer (OSI Layer 2). If not successful, go to K.
K. Check remote host's connectivity to LAN. Contact the node manager of the
remote host. Check that the host is configured correctly and that its network
interface is up. If necessary, use Flowcharts 1 and 12 to verify configuration
and connectivity of the remote host.