ATM Configuration and Troubleshooting Guide

Troubleshooting
Troubleshooting Classical IP
Chapter 9 203
A Start. You should already have completed the steps outlined in the
flowchart “Checking Network Connectivity (Local PVC Configuration)”
on page 196.
B Use ifconfig. If the ping command hangs, check that the adapter’s IP
interface has been set up correctly. Use this command:
ifconfig net_interface
where net_interface is the IP interface to be checked; for example,
ipa0 or cip100. The results from ifconfig should look something like
this, indicating that the interface is UP (the key information is shown in
bold in these examples):
For HP-UX 10.20:
ifconfig ipa0ipa0:flags=61<UP,NOTRAILERS,RUNNING>
inet 25.128.169.32 netmask ffffff00
For HP-UX 11.X:
ifconfig cip100
cip100: flags=843<UP,BROADCAST,RUNNING,MULTICAST>
inet 25.128.1.9 netmask ffffff00 broadcast 25.128.1.255
Check that the IP address (inet) and subnet mask (netmask) are valid.
Alternatively, use netstat -rn. Look at the line with the ATM adapter
entry in the Interface column. The output from netstat -rn should
look something like this (the key information is shown in bold in these
examples):
For HP-UX 10.20:
Routing tables
Destination Gateway Flags Refs Use Interface Pmtu PmtuTime
15.128.169.32 127.0.0.1 UH 1 23735 lo0 4608
127.0.0.1 127.0.0.1 UH 0 66 lo0 4608
default 15.128.168.1 UG 4 13377 lan0 1500
15.128.168.0 15.128.169.32 U 0 4816 lan0 1500
25.128.168.0 25.128.169.32 U 14477974662 ipa0 9180