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DHCP operation
37
Accepting dynamic IP addresses
Using a DHCP client implementation allows the
AP to be offered an IP address according to one
of the following schemes:
• Automatic addressing – the server allocates
the address, but offers it indefinitely.
• Dynamic addressing – the server allocates
an address for a time-limited period.
• Manual allocation – a system administrator
selects addresses, but uses DHCP to
distribute them.
Acceptance of an automatically selected IP
address makes management of the AP difficult,
as its IP address will be unknown, but doesn't
directly affect its operation. The AP will accept
such offers regardless. Administrators are
advised to allocate IP addresses manually for
APs if this is an issue.
A dynamic address which expires (i.e. if lease
renewal and rebind both fail) causes the AP to
reboot. This ensures that the expired IP address
will not be used, and forces a fresh negotiation.
In this case, the log records the reboot and the
reason as DHCP lease expiry.