Siemens SINUMERIK 840D sl Commissioning Manual page 817

DHCPDNoMasterWait
If a synchronizing DHCP server has once seen a master server in the past, then it waits for
synchronization until the time specified here elapses before it becomes the active server.
This additional pause makes it possible for the intended DHCP master to become the active
DHCP server without displacement even if it is shortly switched on thereafter, or takes longer
to boot than other controllers.
Value:
Default:
InternalDNSDomain
This is used to specify the Top Level Domain (TLD) name that is used in the system
network. The DNS server of the NCU assigns names to the devices in the system network in
this zone. Name requests for all other zones are forwarded to an external name server in the
company network.
As presetting the "local" recommended by the RFC1035 is used for local networks, to avoid
conflicts with globally defined domain names.
Recommendation: The preset should be maintained.
Value:
Default:
DisableNATRouting
The default setting permits that a machine can access a company network from the system
via the control using the NAT routing (= "Network Address Translation"). In this case, the
NCU converts the source address of the packages to its own address, and handles the
response packages in the inverse way.
If this variable is set to zero, the NAT routing of the NCU from the internal interfaces eth0
=X120 and ibn0 =X127 to the external network on eth1 =X130 is prevented. In order that the
NAT routing is not simultaneously shut down for both internal networks, using the values
"X120" or "X127", the system network or the commissioning network is selectively shut
down.
Value:
Default:
NCU operating system (IM7)
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
Time in seconds
120
Domain name (letters, numbers, '-', '_', max. 63 characters)
local
empty, 0, 1, X120 or X127
Empty
Configuring the system
2.3 Configuration file "basesys.ini"
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