Chapter 4 83
Troubleshooting 10/100Base-TX/9000
Diagnostic Flowcharts
Flowchart 9 Procedures
A. Execute: ping from known good host through
gateway to known good remote host. This will test
gateway connectivity to the remote network.
B. Successful? If the executing ping returned
successfully, the problem may exist in the routing table
for the problem host. Go to C.
C. Check route table on problem host and all hosts
in between. Execute netstat -r to examine a route
table.
D. Examine gateway. If the gateway is an HP 9000, go
to G. If it is not, go to F.
E. Correct route tables. Ensure that the proper
IP/Internet addresses are assigned in the Destination
and Gateway fields. If you are using subnetting, make
sure that the destination is what you expect: a network
or a host. Go to flowchart 1 to verify that the problem is
solved.
F. Non-HP 9000 or other vendors.Refer to
networking documentation. Refer to the
documentation that came with the gateway for
additional diagnostics.
G. If HP 9000, execute ifconfig on gateway host.
Execute ifconfig for all network interfaces on the
gateway.
H. Network interface up? If the output from ifconfig
does not include the UP parameter, the network
interface is down. Execute netstat -i to check the
status of the network interfaces. An asterisk (*)
indicates that the interface is down. If the network
interface is down, go to I.
If the network interfaces are UP, start again with
flowchart 3. Using flowchart 3, test all network
interfaces on the gateway.
I. Configure interface up. Execute ifconfig on each
interface to bring it up. Start again with flowchart 1.
Using flowchart 1, test all network interfaces on the
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