Configuring DNS/IP [ Configuring Systems for Terminals, Printers, and Other Serial Devices ] MPE/iX 5.5 Documentation
Configuring Systems for Terminals, Printers, and Other Serial Devices
Configuring DNS/IP
Figure 8-1 displays the DNS/IP Routing Configurationscreen. You can
reach this screen by pressing [F1], the [DNS/IP Routing]function key, at
the DTC Configuration screen. See the beginning of this chapter to find
out how to access the [DNS/IP Routing] function key.
Click here to view figure.
Figure 8-1. DNS/IP Routing Configuration Screen
Domain Name Services and IP routing are configured only if you wish to
use DNS to resolve system names when switched DTC ports are connecting to
ARPA (TCP/IP) nodes or when using back-to-back connections. IP routing
is only needed when back-to-back connections and routers will be used on
the network. Do not configure IP routing if no routers will be used.
Follow the steps listed here to enter data for this screen. Refer to the
"Fields" subsection for detailed information about each field on the
screen.
1. "DTC name" is a display-only field.
2. (Optional) Enter the address of the DNS server on the network. If
this field is configured, then default local domain must also be
configured.
3. (Optional) Enter the address of the Backup DNS server on the
network.
4. (Optional) Enter the ARPA default local domain name. If this
field is configured then the Default Server Address must also be
configured.
5. (Optional) Complete the "Default IP router address"
field.
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 Optional field which is the address of a Domain
address 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 Optional field which is the address of a Domain
address 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.
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NOTE When choosing a domain name, ensure that the
same name is not already in use as an NS
nodename.
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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 Optional field which specifies the IP address of
address 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 Optional field which specifies the IP address of
address 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.
Subnet masks specify how many bits of the IP
address to reserve for subdividing the network into
subnets. The initial calculation is done in
binary, with bits reserved for the network and
subnet set to "l"s, and the bits reserved for the
host set to "0"s. The decimal value is then
displayed.
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