I've just inherited systems administration for a small network, on which we have exclusive access to the first 128 IPs on a private virtual subnet. We have a DHCP server which binds IP addresses to specific MAC addresses, as defined in the /etc/dhcp/dhcpd.conf
file on the server (CentOS 6.2), as follows:
host <name>
{
hardware ethernet <mac address>;
fixed-address <ip>;
}
However, in that file there's also comments which basically list a set of core infrastructure, designated
# Non-DHCP STATIC. ONLY critical infrastructure
How and where are non-DHCP static address-MAC binding achieved? I assume the logic for this is that if the DHCP server goes down, these systems (NIS,NFS etc) will remain live - does this make sense?
Finally - clearly DHCP is setting what are, for all intents and purposes, static IPs (i.e. a MAC address and an IP address are bound together). However, then the dhcpd.conf
file also refers to Non-DHCP static IPs in the comments. Is there a more correct term for ones of these, or are they both different types of static IP?