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

Troubleshooting HP-UX LANDRAFT COPY
Diagnostic Flowcharts
Chapter 554
Diagnostic Flowcharts
Below is a summary of the types of network tests in the diagnostic flowcharts. To diagnose
your problem, first check the connections and configuration on your system (Flowcharts 1
through 5). If this does not solve your problem, use flowcharts 6 through 11 to test/verify
connectivity with a remote system.
1, 2 & 3 Configuration Test
4 & 5 Network Level Loopback Test
6 Transport Level Loopback Test (using Internet Services)
7 Link Level Loopback Test
8 LAN Connections Test
9 &10 Gateway Remote Loopback Test
11 Subnet Test
Configuration Test: Verifies the configuration of the network interface on a host using the
nwmgr, lanscan, and ifconfig commands.
Network Level Loopback Test: Checks roundtrip communication between Network Layers on
the source and target host using the ping diagnostic.
Transport Level Loopback Test: Checks roundtrip communication between Transport Layers
on the source and target host using Internet Services telnet and ftp commands.
Link Level Loopback Test: Checks roundtrip communication between Link Levels on the
source and target host using the linkloop diagnostic, or the diagnose operation with nwmgr
command.
LAN Connections Test: Checks the connections between the LAN media and any component
between the LAN media and individual LAN cards.
Gateway Remote Loopback Test: Checks general network connections through a gateway.