Configuration statements in TCPIP.DATA
The TCPIP.DATA configuration statements are summarized in Table 1.
| Statement | Description | See |
|---|---|---|
| ALWAYSWTO | Issue WTO messages for servers. | ALWAYSWTO statement |
| DATASETPREFIX | Set the high-level qualifier for dynamic allocation of data sets. | DATASETPREFIX statement |
| DOMAINORIGIN or DOMAIN (see note) | Specify the domain origin that is appended to the host name to form the fully qualified domain name of a host. | DOMAINORIGIN statement |
| HOSTNAME | Specify the TCP host name of the z/OS® communication server. | HOSTNAME statement |
| LOADDBCSTABLES | Indicate to FTP which DBCS translation tables can be loaded. | LOADDBCSTABLES statement |
| LOOKUP | Specify the order in which the DNS and the local host file are to be used for name resolution. | LOOKUP statement |
| MESSAGECASE | Specify case translation for the FTP server and osnmpd. | MESSAGECASE statement |
| NOCACHE | Specify that the resolver should not use the system-wide cache for any queries associated with applications that use this TCPIP.DATA file. The cache is bypassed for any queries from a DNS server and results obtained from a DNS server are not updated in the cache. | NOCACHE statement |
 NOCACHEREORDER |
Specify that the resolver should not reorder
the list of IP addresses that are provided in response to a
resolution request for the associated host name. |
NOCACHEREORDER statement |
| NSINTERADDR or NAMESERVER Note: A synonym that provides common
statements regardless of whether the statements are defined in an MVS™ data set or z/OS UNIX file.
|
Define the IP address of a name server. The IP address can be either IPv4 or IPv6. | NSINTERADDR statement |
| NSPORTADDR | Specify the name server port number. | NSPORTADDR statement |
| OPTIONS | Specify if resolver debug messages should be issued and the number of periods (.) that need to be contained in a domain name for it to be considered a fully qualified domain name. | OPTIONS statement |
| RESOLVERTIMEOUT | Specify how long the resolver waits for a response while trying to communicate with the name server. | RESOLVERTIMEOUT statement |
| RESOLVERUDPRETRIES | Specify how many times the resolver tries to connect to the name server when using UDP datagrams. | RESOLVERUDPRETRIES statement |
| RESOLVEVIA | Specify the protocol used by the resolver to communicate with the name server. | RESOLVEVIA statement |
| SEARCH | Specify the list of domain names that are appended, in the order listed, to the host name to form the fully qualified domain name of a host. | SEARCH statement |
| SOCKDEBUG | Turn on tracing of TCP/IP socket library calls. | SOCKDEBUG statement |
| SOCKNOTESTSTOR | Stop checking of TCP/IP socket calls for storage access errors on the parameters to the call. | SOCKNOTESTSTOR statement |
| SOCKTESTSTOR | Enable checking of TCP/IP socket calls for storage access errors on the parameters to the call. | SOCKTESTSTOR statement |
| SORTLIST | Specify the ordered list of network numbers (subnets or networks) for the resolver to prefer if it receives multiple addresses as the result of a name query. | SORTLIST statement |
| TCPIPJOBNAME or TCPIPUSERID (see note) | Specify the member name of the cataloged procedure used to start the TCPIP address space. | TCPIPJOBNAME statement |
| TRACE RESOLVER | Trace all queries to and responses from the name server. | TRACE RESOLVER statement |
| TRACE SOCKET | Trace TCP/IP C socket library calls. | TRACE SOCKET statement |
| ; or # | Use either character to indicate a comment. | ; and # statements |
Rule: If any TCPIP.DATA statement is in the GLOBALTCPIPDATA file, it is always used, regardless of what is found in any subsequent TCPIP.DATA statements from the search list.