Can hosts get customized option value when they use DHCPINFORM messages?

Chengyu Fan at
Wed Aug 1 22:08:15 UTC 2012

On Wed, Aug 1, 2012 at 2:34 PM, Randall C Grimshaw <rgrimsha at> wrote:

> apparently not. this causes consternation when clients are initially given
> a custom value at the initial lease and the dhcp inform changes it to a
> default as you observed. the best solution I have found is to tell the
> server it is not authoritative for subnets affected by this. version 4.x.x
> is required for this to work but contrary to the documentation will
> successfully ignore the troublesome dhcpinform requests.

If the client A needs customized configuration, and other clients that are
in the same subnet have different configuration.
Will this way affect others' result? And it seems like that the client A
will not get any configuration by sending DHCPINFORM in your way?


> Randall Grimshaw rgrimsha at
>  ------------------------------
> *From:* at[dhcp-users-bounces+rgrimsha=
> at] on behalf of Chengyu Fan [ at]
> *Sent:* Wednesday, August 01, 2012 1:53 PM
> *To:* dhcp-users at
> *Subject:* Can hosts get customized option value when they use DHCPINFORM
> messages?
>   Hi~
>  Does anyone know if we can let different clients get different option
> value when they query the DHCP server using DHCPINFORM message?
>  I know that we can let a client get customized configuration(different
> option values) using keyword "host".
> But it seems not work when the client uses DHCPINFORM message to query the
> server. When I try it, the server always gives me the configuration in the
> subnet. Can I let the server return the configuration based on the MAC
> address even when the client use DHCPINFORM?
>  Thanks,
>  --
> Regards,
> Chengyu Fan
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at

Chengyu Fan
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