IBM eServer Certification Study Guide - pSeries AIX System Administration

10.15. Basic network problem determination

When a user informs you that a certain system cannot be accessed, check for various network problems. Typically, you will go through these TCP/IP problem determination topics using whichever is applicable to your environment:

• Communication problems

• Name resolution problems

• Routing problems

• Problems with System Resource Controller (SRC) support

• Telnet or rlogin problems

• Configuration problems

• Common problems with network interfaces

• Problems with packet delivery

• Problems with Dynamic Host Configuration Protocol (DHCP)

However, there are other considerations outside the network area that you should check also:

• The server system may be down.

  This will usually reveal itself when you check for communication problems. ...