Technical data

Configuring the DHCP Server
7.7 Configuring DHCP Manually
Table 7–8 (Cont.) BOOTP/DHCP Configuration File Symbols
Symbol Function Value Format Description
t1 DHCP renewal
time
Integer Specifies the time interval (in
seconds) from address assignment
until the client transitions to the
RENEWING state. The value is
specified as a 32-bit unsigned integer.
t2 DHCP rebinding
time
Integer Specifies the time interval (in
seconds) from address assignment
until the client transitions to the
REBINDING state. The value is
specified as a 32-bit unsigned integer.
to Time offset ASCII integer or
auto
Specifies (in seconds) the offset of
the client’s subnet in seconds from
Coordinated Universal Time (UTC).
The offset is expressed as a twos
complement 32-bit integer. A positive
offset indicates a location east of the
zero meridian and a negative offset
indicates a location west of the zero
meridian.
tr Trailer
encapsulation
0 or 1 Specifies whether the client should
negotiate the use of trailers (RFC
893) when using the ARP protocol.
tu Interface MTU ASCII integer Specifies the MTU to use on this
interface.
ts Time server
address list
IP address list Specifies a list of RFC 868 time
servers available to the client.
Servers should be listed in order
of preference.
tt TCP default TTL ASCII integer Specifies the default time to live that
the client should use when sending
TCP segments.
uc User class ASCII string Specifies the type or category of user
or application the client represents.
This option is used by a DHCP
client to optionally identify the type
or category of user or application
it represents. The format of this
option is an NVT ASCII text object
of varying length which represents a
user class of which the client host is
a member.
DHCP administrators may define
specific user class identifiers to
convey information about a host’s
software configuration or about its
user’s preferences. For example,
an identifier may specify that a
particular DHCP client is a member
of the class ‘‘accounting auditors’’,
which have special service needs
such as a particular database server.
(continued on next page)
Configuring the DHCP Server 7–59