Installing and Administering LAN/9000 Software

Chapter 4 95
Troubleshooting LAN/9000
Diagnostic Flowcharts
Flowchart 5 Procedures
A. Host entry in ARP cache? Using arp, check that an
entry exists for the remote host in your system's ARP
cache. For example, suppose the remote host is known
as 192.6.20.2. Enter:
arp 192.6.20.2
B. Remote host up? If there is no ARP cache entry for the
remote host, first check that the remote host is up. If
not, the remote host has not broadcast an ARP
message, and that likely is why there is no entry in the
ARP cache.
C. LAN card O.K.? Use lanadmin to ensure the remote
LAN card is operational.
D. Replace or reset LAN card. When the LAN card is
operational, use lanadmin (1M) to reset. Refer to the
lanadmin(1M) command description or sample output
in this chapter.
E. Bring-up remote host. Have the node manager of the
remote host bring that system up.
F. Entry complete? Perhaps there is an ARP cache entry,
but it is wrong or not complete.
G. Use arp to complete entry. Using arp, enter the correct
Station Address. For more information, refer to the
arp(1M) man page.
H. ping local host. Using ping, do an internal loopback on
your own system. In other words, ping your own IP
address. This will find if the problem is on your end.
I. ping successful? If the internal loopback is successful,
your system is operating properly to the Network
Layer (OSI Layer 3). In addition, you know an ARP
cache entry for the remote host exists on your system.
If this is true, the network interface or software on the
remote host is suspect. Start again with Flowchart 4,
but this time ping from the remote host to your
system.
If the ping was not successful, call your HP
representative for help.