Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

160 Chapter8
Additional DTC Configuration
Configuring DNS/IP
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.
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.