You can use the NW TCPIP OPTION command to enable and disable the mapping of learned host names and IP addresses, and prevent TCP/IP from updating the YourHost and YourDomainName attributes with information from a domain name server. See “Dynamic Association of Host Name/IP Address Information” earlier in this section for details on how TCP/IP updates these attributes.
The format of the command is
NW TCPIP OPT +/- <mapping option>
The mapping options are described in as follows.
|
Mapping Option |
Default |
Description |
|---|---|---|
|
WaitForHN |
OFF |
Enables you to delay the incoming OPEN request to resolve the Hostname for updating the YourHost and YourDomainName attributes. The default is set to OFF; when turned ON, it can cause incoming OPEN requests to be delayed. |
|
CacheLearnedMap |
ON |
Enables you to disable the caching of learned Hostname IPAddress pairs in the TCPIP mapping table. The default is set to ON; when turned OFF, TCPIP will not add learned entries to the mapping table. You can view the mapping table with the NW TCPIP MAP command. |
|
UpdateYHByLearned |
ON |
Enables you to disable the updates to the YourHost and YourDomain attributes by TCPIP if a connection specifies an IPAddress during open. The default is set to ON; when turned OFF, TCPIP will not update the YourHost and YourDomain attributes for all connections. Exception: If the WaitForHN option is set to ON, the UpdateYHByLearned option is ignored for incoming OPEN requests. |
If all these options are set to OFF, TCPIP will not call the Resolver for opens that specify an IPAddress.
