Creating a Dhcp Configuration String, Option Name

Inova OnTime Digital Clock Owner's Manual

Creating a DHCP Configuration String

The following table describes the five options that can be used in a configuration string when establishing a private DHCP server option for automatically configuring the clock. The format used is option name=option value, with the options separated by semicolons in the configuration string. This string is added to the DHCP server, as described in the next section. (See Table 4 for example configuration strings).

Option

Name

timeserver

timezone

dst

Option

Value

SNTP Time Server name or IP address

hh:mm time offset

none, [rule specification]

Configuration

Setting

SNTP Time Server

(sntp –h command)

Timezone offset

(timezone

command)

Daylight Saving Time

(dst command)

Description

Sets the SNTP Time server Host Name or IP address to use for time synchronization. If a Host Name is used, then the DHCP server must also provide a DNS server to use to resolve the Host Name.

Sets the number of hours and minutes to offset from UTC time when displaying time. This can be negative. The minutes (:mm) are optional.

•none - Disable the Daylight Saving Time adjustment.

•Other values parsed based on the DST rule format. See the dst command for more information, the format is 8 numbers in the order: startDOW startDay startMonth startTime endDOW endDay endMonth endTime

24hour

showcolon

true, false, t, f

Clock hours display mode

(display -t command)

Clock colon display mode

(display -c command)

If true the clock uses 24hour (military) time format and disables the AM/PM light, otherwise it uses 12hour time format and enables the AM/PM light.

If true the colon separator between the hours and minutes is lit.

Table 3: DHCP Private Option String Parameters

Table 4 on the next page contains examples of the configuration strings.

All claims based on information publicly available at time of printing. All other product or service names mentioned in this document may be