OnTime Clock
Installation and User Guide
Firmware Version 1
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© 2015 Novanex, Inc. | All rights reserved | page 23
set a different DHCP option number on the clock or to disable this feature altogether. The
ipconfig command is defined in Appendix A.
The OnTime Management settings can be configured via any DHCP option number in the
range 128-254, by using the mgmt
–
o command on the clock. Configuring the OnTime
Management settings via DHCP can disabled by setting the mgmt
–
o command on the
clock to 0 (zero). The mgmt command is defined in Appendix A: Clock Configuration.
6.7. Verifying the DHCP Configuration Settings on a Clock
The
dhcpconfig
telnet command lists all the configuration settings that were retrieved
by the clock from the DHCP Server and that are currently in effect. If an error arises
while parsing the DHCP options received from the server, the error will be shown in
the command output.
The dhcpconfig command output below shows the settings that were received from the
DHCP Server using the configuration string in the first row of Table 6.
dhcpconfig
Using Option Code 230 for DHCP based Clock Configuration.
The following DHCP based configuration settings are in use:
Time Server : ntp.inovasolutions.com
Time Zone : -5
DST Rule : -1 8 2 2 1 1 10 2
Notes:
•
A clock must be re-booted to request a new configuration string from the DHCP
Server. The clock does not automatically request a new configuration string at
the expiration of the DHCP lease interval.
•
If option 230 (or the alternate specified on the clock) is not configured on the
DHCP Server, the clock will receive an IP address in the usual fashion but the
clock’s settings for Time Server, Time Zone,
DST, etc. will come from the default
internal configuration.
6.8. DHCP Configuration Example for Microsoft Server
Appendix B: Configuring DHCP Options for Microsoft Servers, contains an example of
how to configure options on a Microsoft DHCP Server, such as the one that is bundled
with Windows 2003 Server. It is for reference only. It is assumed that skilled IT
personnel are the only people authorized to edit DHCP Server settings.
