Ethernet Support Guide for HP-UX 11i v3

4.3.4 Flowchart 4: ARP test
Use the process in this flowchart to validate arp entries and remote host availability.
Figure 4 Flowchart 4: ARP test
NO
NO
Use ARP to
correct and
complete the
entry.
Enter ping remote-host
2000 -n 1 command.
Bring up
remote host.
ARP
test
Is remote
host entry
in ARP
cache?
Remote
host
up?
Is the
ARP entry
correct and
complete?
Repeat
ping
test
NO
YES
YES
YES
4.3.4.1 Flowchart 4 procedures
• Enter ping to the remote host’s IP address so that an ARP entry is added. Whether or not
ping is successful, proceed to the next step.
• Use arp to verify that an entry exists for the remote host in your system's ARP cache, by
entering the arp hostname command.
• If there is no ARP entry for the remote host, check whether the remote host is up. If not, bring
up the remote host and continue to the ping test (Figure 5).
• If the ARP entry is correct or complete, continue to the ping test. Otherwise, use arp to enter
the correct station address of the remote system and continue to the ping test (Figure 5).
4.3.5 Flowchart 5: ping test
Use the process in Flowchart 5 to check communication between network layers on the source and
target host.
44 Troubleshooting