Installing and Administering LAN/9000 Software

80 Chapter4
Troubleshooting LAN/9000
Diagnostic Flowcharts
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 lanscan(1M), and ifconfig(1M) commands.
Network Level Loopback Test: Checks roundtrip communication between
Network Layers on the source and target host using the ping(1M)
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(1M)
diagnostic.
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.
Subnet Test: Verifies the correct use of subnets.