Installing and Administering HP FDDI/9000 Software

80 Chapter 4

Troubleshooting HP FDDI/9000

Diagnostic Flowcharts

Flowchart 11 Procedures

A. Execute: ping from known good host through

gateway to known remote host. This will test

gateway connectivity to the remote network.

B. Successful? If ping was successful, the problem may

exist in the routing table for the problem host. Go to C.

If not, go to D.

C. Check route table on problem host and all

hosts between. Execute netstat -r to examine a

route table. Go to E.

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

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 6.

F. If other HP 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, go to

Flowchart 2. Test all network interfaces on the

gateway. Running is always displayed. It indicates only

that there is OS support for the interface.

I. Configure interface up. Execute ifconﬁg on each

interface to bring it up. Start again with Flowchart 6.

Test all network interfaces on the gateway.