Assignment of an IP address
4.2 Initial assignment of an IP address
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
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Configuration Manual, 11/2014, C79000-G8976-C350-03
Outside the local area network, the distinction between network ID and host ID is of no
significance, in this case packets are delivered based on the entire IP address.
Note
In the bit representation of the subnet mask, the "ones" must be set left-justified; in other
words, there must be no "zeros" between the "ones".
4.2
Initial assignment of an IP address
Configuration options
An initial IP address for a SCALANCE W700 cannot be assigned using Web Based
Management (WBM) or the Command Line Interface (CLI) over Telnet because these
configuration tools require that an IP address already exists.
The following options are available to assign an IP address to an unconfigured device
currently without an IP address:
●
DHCP (default)
●
Primary Setup Tool
●
STEP 7
●
NCM PC
Note
When the product ships and following "Restore Factory Defaults and Restart", DHCP is
enabled. If a DHCP server is available in the local area network, and this responds to the
DHCP request of a SCALANCE W700, the IP address, subnet mask and gateway are
assigned automatically when the device first starts up. " Restore Memory Defaults and
Restart" does not delete an IP address assigned either by DHCP or by the user.
4.3
Address assignment with DHCP
Properties of DHCP
DHCP (Dynamic Host Configuration Protocol) is a method for automatic assignment of IP
addresses. It has the following characteristics:
●
DHCP can be used both when starting up a device and during ongoing operation.
●
The assigned IP address remains valid only for a limited time known as the lease time.
Once this period has elapsed, the client must either request a new IP address or extend
the lease time of the existing IP address.
