Basic TCP/IP Network Troubleshooting in AIX

Basic TCP/IP Network Troubleshooting
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To see default network interface card:

   netstat -rn |egrep '(Destination|default)'


To troubleshoot name resolution:

   Check the services:

   - DNS (bind)
   - NIS (yp)
   - local (/etc/hosts)

   The above list is the default order, but
   the default can be overridden by
   /etc/irs.conf, which can be overridden by
   /etc/netsvc.conf, which can be overridden
   by the NSORDER environment variable.


To troubleshoot a server that fails to return a ping:

   The server might not be down, but its routing table
   might have errors. Someone must walk up to the
   server, login, and use netstat to determine whether
   the server can see your client's subnet.
 

To troubleshoot network services:

   Check /etc/inetd.conf to determine your service
   is not commented out. Also, try HUP'ing the
   inetd daemon:

   refresh -s inetd