HP-UX LAN Administrator's Guide (July 2003)

Troubleshooting HP-UX LANDRAFT COPY
Diagnostic Flowcharts
Chapter 472
Flowchart 7 Procedures
A. Execute: linkloop on local interface. Execute the linkloop command with
the station address of the local interface. Execute lanscan 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) man page.
B. linkloop successful? If not, your LAN card may not be operational. Go to
Flowchart 8.
C. Execute: linkloop to remote host. Enter the link level address (station
address) of the remote host.
D. linkloop 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. Restart this
flowchart using a different remote host. NOTE: Make sure the remote host
is an HP Server and try again.
J. linkloop 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.