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ND-CLK User Manual- Rev 1.0.1 - Sep-08
16
Symmetricom
®
, Inc
[Note: The static IP address you enter must not be in use by another device on the
network , this includes IP address ranges reserved for use by the DHCP server. If a
static IP address is used which creates a duplicate IP address condition, the network
clock will be re-assigned a fallback IP address of 169.254.xxx.xxx ]
169.254.xxx.xxx IP (fallback) address
DHCP is enabled by default. If DHCP is enabled and no DHCP server can be found the NTD clock will
default to a 169.254.xxx.xxx address.
In addition, if an IP address conflict is determined when the Ethernet interface is initialized (either DHCP
or static) the NTD clock will default to a 169.254.xxx.xxx address.
This 169.254.xxx.xxx is a link local address range (i.e. not allowed on the internet) and is used by
Microsoft when their DHCP clients cannot find a DHCP server.
To determine the cause of why the clock fell back to a 169.254.xxx.xxx address the user should display the
status of the clock.
Please see the “Status” section for details as to how to determine the cause of the fallback IP address.
[Note: Devices which have been assigned a fallback IP address of 169.254.xxx.xxx will
be displayed in the main WinDiscovery window with
RED
text, indicating a problem with
the configuration.]
Device Name
Each clock is programmed at the factory with a factory device name. This name includes
the model name and a “MAC address” extension.
[Hint: You can change the device name to one convenient for your site – preferably one
that helps you to later identify the exact physical location of the device. ]
Administrative Hub
[Note: the Administrative Hub configuration item is reserved for future use.]