Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90057)

Additional DTC Configuration
Configuring DNS/IP
Chapter 8
143
6. (Optional) Complete the “Backup IP router address” field.
7. Complete the “Subnet mask” field. The default is 255.000.000.000.
8. After you have entered the desired values, press the
[Save Data]
key.
9. Press the
[Prior Screen]
key to return to the DTC Configuration screen. Or, press
[Validate Link/DTS]
to validate your configuration if you have completed configuration
for your DTCs.
Fields DTC name A display-only field. The configuration applies to the DTC whose name
is shown.
Default Server address Optional field which is the address of a Domain Name Server
that will be used to resolve ARPA domain names into an IP address. If
this field is configured, then default local domain must also be
configured.
Backup Server address Optional field which is the address of a Domain Name Server
that will be used to resolve ARPA domain names if the Default Server
is not available.
Default Local Domain Optional field whose value is concatenated with a name the
user provides to generate a fully qualified domain name. If this field is
configured then the Default Server Address must also be configured.
This field consists of alphanumeric characters separated by periods.
There can be any number of fields, but the total length can not exceed
50 characters. This field is used by the DTC to generate a fully
qualified Domain Name when a user connects to a ARPA node from a
switched DTC port. Refer to the DTC Technical Reference manual for
further information on how the DTC uses this field.
NOTE When choosing a domain name, ensure that the same name is not
already in use as an NS nodename.
When a user connected to the DTC user interface types c[onnect]
<nodename>, The DTC attempts to generate a fully qualified domain
name. If the <nodename> contains at least one period. The DTC
assumes it is already a domain name and doesn’t use this field.
Otherwise it concatenates the <nodename> with the contents of this
field. The DTC then sends a request to the Default Server to resolve
the domain name into an IP address.
Default IP router address Optional field which specifies the IP address of the
default router. The router routes outbound packets for destinations
outside the local subnet. The address of the IP router is used for
back-to-back connections or extended switching configurations.
Backup IP router address Optional field which specifies the IP address of the backup
router. The backup router is used if the default router is not available.
Subnet mask Subnet masks are used by IP to check if the packets should be sent to
the destination without routing, or if it should be routed to a
destination network different from the current network or subnet. The
first field must be 255. If no subnetting is required, use the default
255.000.000.000.