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Static IP

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Special Forums IP Networking Static IP
# 8  
Old 05-18-2003
Yes, and normally if an IP address is statically assigned, the DHCP server will not try to assign it because the ARP cache will show that address in use. So, if you accidentally use an IP address that the DHCP server might allocate, if it is properly looking at the ARP table, it will not try to assign it.

Having said that, all DHCP servers are not created equal; but for small LANS, no problem usually. For very big LAN segments, more robust DHCP servers are a good thing.

BTW, on my little D-Link cable-modem router with DHCP, it is a configuration option to tell the D-Link DHCP process what range of IPs to allocate.
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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)