Digi WAN 3G User Manual page 61

grace period
When a DHCP client actively releases a lease, or when the lease expires without being renewed
by the client, the DHCP server does not immediately delete the lease record and return the
associated IP address to the available address pool. A grace period is the interval of time for
which the lease record is retained before the DHCP server automatically deletes the record from
its lease list, thereby making the IP address available for lease assignment to another client. The
grace period is not a configurable value. See also the discussion of the grace period and what it
means when the DHCP server is running in "View and manage current DHCP leases" on page
169.
reservation
You may use a reservation to create a permanent address lease assignment by the DHCP server.
Reservations assure that a specified hardware device on the subnet can always use the same IP
address. Address lease reservations associate a specific IP address with a specific client's
Ethernet MAC address.
options
Options are other client configuration parameters that the DHCP server can assign when serving
leases to DHCP clients. Most options are defined in RFC 2132. The DHCP server in the Digi
device supports a limited set of options:
– Option 3: Routers on Subnet
– Option 6: DNS Servers
Addresses in the DHCP server settings
The IP address and subnet mask of the DHCP server's scope are the static IP configuration settings
for the Digi device itself.
The default gateway (router) provided to a client with the lease information is the IP address of the
Digi device.
The DNS servers provided to a client with the lease information are the DNS server addresses
configured in the Digi device. These addresses include any DNS server addresses that the Digi
device acquires when it connects to the mobile network.
C o n f i g u r e D i g i d e v i c e s
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