Senatek LS100 User Manual

 

25

 
> set ip static 192.168.1.10 255.255.255.0 192.168.1.1 
OK 
 

 

 

Dynamic Host Configuration Protocol (DHCP) is a communications  protocol  that lets network 

administrators  manage  and automate the assignment of  IP addresses  centrally  in an organization's 

network. DHCP lets a network administrator supervise and distribute IP addresses from a central point 

and automatically send a new IP address when a computer is plugged into a different place in the 

network. 

As described in the section 3.1,  the IP address must be entered manually at each computer  in Static 

IP mode  and, if computers move to another location in another part of the network, a new IP address 

must be entered. Meanwhile, all the parameters including the IP address, subnet mask, gateway, DNS 

servers will be automatically configured when the IP address is assigned in DHCP mode. DHCP uses 

the concept of a "lease" or amount of time for which a given IP address will be valid for a computer. All 

the parameters required to assign  an  IP address  are  configured on DHCP server side, and each 

DHCP client computer receives this information when the IP address is provided at its boot-up.   

To obtain an IP address, theLS100 sends a corresponding  DHCP request as a broadcast  over the 

network after each reset. The reply generated by the DHCP server contains the IP address as well as 

the subnet mask, gateway address, DNS servers and the lease time. The  LS100 immediately places 

this information in its non-volatile memory. If the operating time reaches the lease time, the LS100 will 

request the DHCP server for renewal of its lease time. If the DHCP server approves extending the 

lease, the LS100 can continue to work with the current IP address. Otherwise, the LS100 will start the 

procedure to request a new IP address to the DHCP server. 

A  DHCP sever assigns IP addresses dynamically from an  IP  address pool, which is managed  by the 

network administrator. This means DHCP client, i.e. the  LS100, receives a different IP address each 

time  it boots up. To prevent the  case that users do not know the IP address of the LS100 in such 

environments, its IP address should be reserved on the DHCP server side. In order to  reserve the IP 

address in the DHCP network, the administrator needs the MAC address of the  LS100 found on the 

label sticker at the bottom of the LS100: 

MAC=00:01:95:04:0c:a1