IBM SC41-5420-04 manual SYSNAM890, Loopback, Localhost

Work with TCP/IP Host Table Entries

System: SYSNAM890

Type options, press Enter.

1=Add 2=Change 4=Remove 5=Display 7=Rename

Internet	Host
Opt Address	Name

________________

_	9.4.73.211	BERN
_	9.4.73.212	SYSNAM890
_	9.4.73.214	MACIAN
_	9.4.191.76	DNS
_	9.125.87.127	SYSNAMEND.ENDICOTT.IBM.COM
_	127.0.0.1	LOOPBACK
		LOCALHOST

Figure 14. Example of a Fully Qualified Host Table Entry

Additional host names are useful as alternative nicknames. See the examples in Figure 15.

Host names need not be unique. When searching the host table with a duplicate host name, the result is random. However, IP addresses have to be unique. The uniqueness of the IP address is enforced at the time you try to add a new entry to the host table.

Note: An IP address cannot be used as a host name.

	Work with TCP/IP Host Table Entries
	System: SYSNAM890
Type options, press Enter.
1=Add 2=Change	4=Remove 5=Display 7=Rename
Internet	Host
Opt Address	Name

________________

_	9.4.73.211	BERN
_	9.4.73.212	SYSNAM890
		M03
		F25
		MYSYSTEM
_	9.4.73.214	MACIAN
_	9.4.191.76	DNS
_	9.4.73.198	SYSNAMRS

Figure 15. Multiple Host Names

To remove one of the additional host names, select option 2 to change the selected host table entry. Type *BLANK over the host name to remove it.

Note: The fully qualified host name is used when sending mail between two TCP/IP hosts.

Notice in the example that the name of server SYSNAM890 is in the host table too. There are several reasons to put your host name in the host table:

vYou may want to use your host name when using FTP, TELNET, or PING to test your own system’s configuration.

Chapter 1. Configuring TCP/IP 21