\label{module:dhcp:pool-objekt-karteikarte-fortgeschritten}%

\ucsTabentry{Failover peer}
If the DHCP failover mechanism is to be included, the unique
identifier for the DHCP server pair must be given in this input field
which is responsible for this pool. The identifier entered here must
match the identifier entered for both the participating DHCP servers
in the \ucsURL{/etc/dhcp3/dhcpd.conf} file.

As dynamic BOOTP is not compatible with the DHCP failover mechanism,
the entry \ucsMenuEntry{deny} must be selected in the
\ucsMenuEntry{Allow dynamic BOOTP clients } select list. It is
not sufficient to select \ucsMenuEntry{deny} in the
\ucsMenuEntry{BOOTP} select list on the
\ucsMenuEntry{[Allow/Deny]} tab for the DHCP server or DHCP
subnet!

\ucsNote{The servers which make up the failover pair must be
  configured accordingly for the DHCP failover mechanism to work. TO
  do this, the configuration files are adapted locally on the servers
  and thus the configuration cannot be performed with the \ucsUDM{}.}

\ucsTabentry{Allow known clients}
When the \ucsMenuEntry{allow} entry is selected, the DHCP service
assigns IP addresses from the pool to clients with a \ucsName{DHCP host}
entry below the DHCP service. If \ucsMenuEntry{deny} is selected, the
DCHP service does not assign these clients IP addresses from this pool
(see Note below).

\ucsTabentry{Allow unknown clients}
When the \ucsMenuEntry{allow} entry is selected, the DHCP service
assigns IP addresses from the pool to clients without a \ucsName{DHCP host}
entry under the DHCP service. If \ucsMenuEntry{deny} is selected, the
DCHP service does not assign these clients IP addresses from this pool
(see Note below).

\ucsTabentry{Allow dynamic BOOTP clients}
When the \ucsMenuEntry{allow} entry is selected, the DHCP service also
assigns IP addresses from the pool to clients which sent a request via
the BOOTP protocol. Dynamic BOOTP clients do not receive an IP address
from this pool if the \ucsMenuEntry{deny} entry is selected (see Note
below).

\ucsTabentry{All clients}
When the \ucsMenuEntry{allow} entry is selected, the DHCP service
assigns IP addresses from the pool to any clients as long as they are
not already excluded by other settings. The DHCP service does not
assign IP addresses from this pool, irrespective of the type of client
making the request, if the \ucsMenuEntry{deny} entry is selected (see
Note below).

This setting can be used to force all active clients to allow
themselves to be assigned a new IP address when they renew their
existing IP address as part of an address restructuring in the
network.

\ucsNote{If \ucsMenuEntry{allow} has been selected in one of more
  select lists, a client must fulfill the \ucsMenuEntry{allow} settings
  for at least one of these to receive an IP address. If at least one
  \ucsMenuEntry{deny} setting applies to a client, the client will not
  be assigned an IP address, even if other \ucsMenuEntry{allow}
  settings would permit this.}
