HP -PB 10 User Manual download pdf (Page 83)

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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HP -PB 10 User Manual Page 83