Digi IX30 User Manual page 173

Interfaces
8. (Optional) For Lease range start and Lease range end, type the lowest and highest IP address
that the DHCP server will assign to a client. This value represents the low order byte of the
address (the final triplet in an IPv4 address, for example, 192.168.2.xxx). The remainder of the
IP address will be based on the LAN's static IP address as defined in the Address field.
Allowed values are between 1 and 254, and the default is 100 for Lease range start and 250
for Lease range end.
Sequential DHCP address allocation:
n
By default, DHCP addresses are assigned psuedo-randomly, using a hash of the client's
MAC address to determine the IP address that gets assigned. You can configure the
device to use sequential IP addresses instead:
a. Click Network > Advanced.
b. Click to enable Sequential DHCP address allocation.
Because sequential mode does not use a hash based on the client's MAC address, when
DHCP lease expires, the client is not likely to get the same IP address assigned to it.
Therefore, sentential DHCP address allocation generally should not be used.
9. Optional DHCP server settings:
a. Click to expand Advanced settings.
b. For Gateway, select either:
n
n
n
The default is Automatic.
c. For MTU,
n
n
n
The default is Automatic.
d. For Domain name suffix, type the domain name that should be appended to host names.
e. For Primary and Secondary DNS, Primary and Secondary NTP server, and Primary and
Secondary WINS server, select either:
n
n
n
f. For Bootfile name, type the relative path and file name of the bootfile on the TFTP server.
g. For TFTP server name, type the IP address or host name of the TFTP server.
10. See Configure DHCP options
11. See Map static IP addresses to hosts
12. Click Apply to save the configuration and apply the change.

Command line
IX30 User Guide
None: No gateway is broadcast by the DHCP server. Client destinations must be
resolvable without a gateway.
Automatic: Broadcasts the IX30 device's gateway.
Custom: Allows you to identify the IP address of a Custom gateway to be
broadcast.
None: An MTU of length 0 is broadcast. This is not recommended.
Automatic: No MTU is broadcast and clients will determine their own MTU.
Custom: Allows you to identify a Custom MTU to be broadcast.
None: No server is broadcast.
Automatic: Broadcasts the IX30 device's server.
Custom: Allows you to identify the IP address of the server.
for information about Custom DHCP options.
for information about Static leases.
Local Area Networks (LANs)
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