Multiple matching dhcpd.conf MAC addresses

Sten Carlsen stenc at
Sat Mar 30 18:45:07 UTC 2013

>From the MAN page:

The *host* declaration provides a scope in which to provide
configuration information about a specific client, and also provides a
way to assign a client a fixed address. The host declaration provides a
way for the DHCP server to identify a DHCP or BOOTP client, and also a
way to assign the client a static IP address.

If it is desirable to be able to boot a DHCP or BOOTP client on more
than one subnet with fixed addresses, more than one address may be
specified in the /fixed-address/ declaration, or more than one *host*
statement may be specified matching the same client.

If client-specific boot parameters must change based on the network to
which the client is attached, then multiple *host* declarations should
be used. The *host* declarations will only match a client if one of
their /fixed-address/ statements is viable on the subnet (or shared
network) where the client is attached. Conversely, for a *host*
declaration to match a client being allocated a dynamic address, it must
not have any /fixed-address/ statements. You may therefore need a
mixture of *host* declarations for any given client...some having
/fixed-address/ statements, others without.

Seems to be perfectly viable.

On 30/03/13 18:26, Dean Gibson (DNS Administrator) wrote:
> If I have two (distinct/unique) "subnet" declarations, and have two
> "host" declarations with the same "hardware address" but different
> "fixed-address" values, with one "fixed-address" matching the first
> "subnet" declaration, and the other "fixed-address" matching the
> second "subnet" declaration, will this work properly ?
> I would like to have the same host be able to physically move from one
> subnet to the other, without having to change the dhcpd.conf file and
> restart the dhcpd servers.
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at

Best regards

Sten Carlsen

No improvements come from shouting:


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