ELSA Cable R102 Description of the menu options, Off The device does not operate as a Dhcp server

R102 Description of the menu options

Start-address- pool End-address- pool

Netmask

Broadcast

Max.-lease- time-minute(s)

Off: The device does not operate as a DHCP server.

Auto: The device regularly checks whether there is another DHCP server in the LAN. If not, it operates as a DHCP server and issues IP addresses to local clients.

If there is no cable or LAN-IP address entered in the TCP/IP module (e.g. factory setting), the cable modem will issue IP addresses from the address range 10.0.0.2 - 10.0.0.253 to all DHCP clients in auto mode.

The IP address assigned is taken from the address pool selected ('Start-address-pool' to 'End-address-pool'). Any valid addresses in the local network can be entered here.

If 0.0.0.0 is entered instead, the device will determine the appropriate addresses (start or end) from the settings under 'Setup/TCP module'. The procedure is as follows:

KIf only the cable or LAN-IP address is entered, the start or end of the pool is determined by means of the associated network mask.

KIf both addresses have been specified, the LAN-IP address has priority for determining the pool.

KThe start address of the pool is either the address given in the DHCP module or the first valid address in the local network.

KThe end address of the pool is either the address given in the DHCP module or the last valid address in the local network.

A valid address is then taken from the IP address pool. If the computer was already assigned an IP address at some point in the past, it requests this same address and the DHCP server attempts to reassign this address if it has not already been assigned to another computer.

The DHCP server also checks whether the address that is to be assigned to the computer is unique in the local network. It does this by issuing an ARP request to the address. If the ARP request is answered, the DHCP server begins the procedure again with a new address. As soon as the uniqueness of an address has been established, the requesting computer is assigned the address found.

The network mask is assigned in the same way as the IP address:

The system either assigns the network mask entered in the DHCP module or uses the network mask that belongs to the local network (determined during address assignment).

The broadcast address is assigned in the same way as the IP address:

The system either assigns the broadcast address entered in the DHCP module or uses the broadcast address that belongs to the local network (determined during address assignment).

Here you can enter the maximum period of validity that the DHCP server assigns a host.

The DEFAULT value of 6000 minutes equals approximately 4 days.

ELSA MicroLink Cable