TRONTEQ ROQSTAR 006-130-100, Руководство пользователя

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User Manual ROQSTAR
Support: www.tronteq.de/support
Release 11/2016
Page 27 of 37
12. DHCP
Order No. 006-130-102
The service Dynamic Host Configuration Protocol (DHCP) provides IP addresses to the network. The
configuration is available under
Configuration > DHCP. The table on the left allows for configuring the
global DHCP parameters.
Option Description
Poolsize Defines a range of IP addresses that are awarded to the clients. The two IP
addresses must be in the same subnet mask as defined by the network.
Netmask Defines the subnet mask.
Gateway Defines the gateway.
DNS Defines one or two DNS server that is assigned to the clients.
Domain Defines a domain that is assigned to the clients.
Leasetime The leasetime is the time in seconds that the client can keep the IP address
which was assigned to him. Shortly before the time expires, the client can
extend the lease. The lease time must be in the range of 1000 to 1000000.
The right table shows the static set addresses. An entry consists of a MAC and an IP address and can
be removed by the "Remove" button. In the bottom line, it is possible to create new assignments.
With Static Leases IP addresses for devices can be assigned specifically
based on the MAC address.
With the button dynamic leases you get a list of all dynamically assigned IP addresses.
Option Description
IP assigned IP address
Mac Mac address of the host
Host name of the hosts
Expires time how long the IP address is still reserved
12.1. DHCP Option 82
The option 82 allows you to assign IP addresses not to MAC addresses but rather to an interface. This
can be done with the button
“DHCP option 82”. After you click on it a window opens where you can
enter an IP address for the assigned interface. With the update button, the changes will be applied.
The DHCP option 82 allows a fast exchange of devices. The new devices
will receive the same IP address as the replaced device used on this port
before.
Static Leases have a higher priority than DHCP option 82 entries. If a device is connected to a port
with DHCP Option 82 entry and has a MAC address with static lease, then the IP address which is
defined in the static will be assigned to the device.
IP addresses that are assigned via DHCP Option 82, remain bound to the device when it is connected
within the lease time to a port without DHCP option 82.