DHCP operation 35
• DHCP response with no option string – AP
will operate using its stored configuration,
but with the IP address provided by DHCP.
• DHCP response with option string and/or a
configuration file reference – AP will
accept the parameters given, and fill in the
remainder from its stored configuration.
The AP gives precedence to such an offer,
and will select it in preference to a simple IP
address offer.
The options received via DHCP do not become
permanently stored by the AP, and will lapse at
the next restart of the AP (which will
immediately re-request parameters via DHCP).
The existing methods of configuring the AP
(command line and web) were not designed to
cope with this, but the command line interface
has no trouble – it has commands to show both
current and pending configuration (in his case,
pending effectively means stored settings that
have been overridden by the temporary DHCP
configuration). The web interface works
throughout on pending configuration, and
generally overlooks the DHCP modifications.
However, using restore active settings in the web
interface will have the effect of making the
DHCP configuration permanent.