Dhcp Server - Teltonika RUT955 User Manual

RUT955 User's Manual
7.3.2

DHCP Server

DHCP server is the router side service that can automatically configure the TCP/IP settings of any device that
requests such a service. If you connect a device that has been configured to obtain an IP address automatically the
DHCP server will lease out an IP address and the device will be able to communicate with the router.
7.3.2.1 General Setup
Field Name Sample value
1. DHCP Enable / Disable/
DHCP Relay
2. Start 100
3. Limit 150
4. Lease time 12
Teltonika Solutions
Explanation
Enables or disables DHCP Server. If DHCP Relay is selected, you will be prompted
to enter an IP address of another DHCP server in your LAN. In this case,
Whenever a new device connects to the router, the router will redirect any DHCP
requests to the specified DHCP Server
The starting IP address value. e.g., if your router's LAN IP is 192.168.2.1 and your
subnet mask is 255.255.255.0 that means that in your network a valid IP address
has to be in the range of [192.168.2.1 – 192.168.2.254](192.168.2.0 and
192.168.2.255 are special unavailable addresses). If the Start value is set to 100
then the DHCP server will only lease out addresses starting from 192.168.2.100
How many addresses the DHCP server can lease out. Continuing from the above
example: if the start address is 192.168.2.100 and the server can lease out 150
(sample value) addresses starting from 192.168.2.100 and ending in
192.168.2.249 (100 + 150 – 1 = 249; this is because the first address is inclusive)
The duration of an IP lease. Leased out addresses will expire after the amount of
time specified in this field and the device that was using the lease will have to
send a new DHCP request to the router's DHCP server. However, if the device
stays connected, its lease will be renewed after half of the specified amount of
time passes, e.g., if the lease time is 12 hours, then every 6 hours the device will
send a request to the router asking to renew its lease. Lease time can be set in
hours or minutes. The minimal amount of time that can be specified is 2min
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