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Full Discussion: Purpose of Static IP address through DHCP
Operating Systems Linux Red Hat Purpose of Static IP address through DHCP Post 302534010 by Lazydog on Sunday 26th of June 2011 12:44:00 PM
Old 06-26-2011
Here is the thought process;

DHCP is use for mobile devices which could/do move around form one network to another, i.e., Laptops.

Static is used for device that would not move around, i.e., Servers, Desktops and Printers.

If your network is growing then any new device that is static would get a static IP address for the new network. Mobile device connecting to the new network would get a DHCP address from the new network.

I guess if you are working for Mom & Pop you don't need to think this way but in an environment of 6000+ employees and 10000+ devices, using DHCP for static is not going to cut it.

Here is another thing to think about. Just because you map an ip address to a MAC address doesn't mean the machine is going to be assigned to that device. MAC spoofing ring any bells? This is why you want devices that provide a serves to have a static IP Address not some sort of DHCP static.

At the end of the day it all comes down to what you prefer. I prefer static devices to have static addresses and mobile devices to have DHCP addresses. If you cannot see far enough into the future to plan ahead for a growing network.......
 

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LEARN ABOUT CENTOS

dhcp_release

DHCP_RELEASE(1) 					      General Commands Manual						   DHCP_RELEASE(1)

NAME

       dhcp_release - Release a DHCP lease on a the local dnsmasq DHCP server.

SYNOPSIS

       dhcp_release <interface> <address> <MAC address> <client_id>

DESCRIPTION

       A utility which forces the DHCP server running on this machine to release a DHCP lease.

       Send a DHCPRELEASE message via the specified interface to tell the local DHCP server to delete a particular lease.

       The  interface  argument  is  the interface in which a DHCP request _would_ be received if it was coming from the client, rather than being
       faked up here.

       The address argument is a dotted-quad IP addresses and mandatory.

       The MAC address is colon separated hex, and is mandatory. It may be prefixed by an address-type byte followed by -, eg

       10-11:22:33:44:55:66

       but if the address-type byte is missing it is assumed to be 1, the type for ethernet. This encoding is the one used in dnsmasq lease files.

       The client-id is optional. If it is "*" then it treated as being missing.

NOTES

       MUST be run as root - will fail otherwise.

LIMITATIONS

       Only usable on IPv4 DHCP leases.

SEE ALSO

       dnsmasq(8)

AUTHOR

       This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.

																   DHCP_RELEASE(1)
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