RUGGEDCOM ROX II
User Guide
Chapter 5
Setup and Configuration
Monitoring Subscribers 287
Parameter Description
Address type The address type of the remote machine.
When The number of seconds since the last poll of the reference clock.
Poll The polling interval in seconds.
Reach An 8-bit left-rotating register. Any 1 bit means that a time packet was received.
Delay The time delay (in milliseconds) to communicate with the reference clock.
Offset The offset (in milliseconds) between our time and that of the reference clock.
Jitter The observed jitter (in milliseconds).
Section 5.12.10
Monitoring Subscribers
ROX II monitors the subscriptions of up to 600 hosts (e.g. clients, servers and peers) that are connected to the
NTP server. However, the command used to display the list is only available in the CLI. For more information
about how to monitor hosts that have subscribed to the NTP service, refer to the ROX II v2.6 User Guide.
Section 5.12.11
Managing NTP Servers
ROX II can periodically refer to a remote NTP server to correct any accumulated drift in the onboard clock. ROX II
can also serve time via SNTP (Simple Network Time Protocol) to hosts that request it.
NTP servers can be added with or without authentication keys. To associate an authentication key with an NTP
server, first define a server key. For information about adding server keys, refer to Section 5.12.13.2, “Adding a
Server Key”.
The following sections describe how to configure and manage NTP servers:
• Section 5.12.11.1, “Viewing a List of NTP Servers”
• Section 5.12.11.2, “Adding an NTP Server”
• Section 5.12.11.3, “Deleting an NTP Server”
Section 5.12.11.1
Viewing a List of NTP Servers
To view a list of NTP servers configured on the device, navigate to services » time » ntp » server. If servers
have been configured, the Network Time Protocol (NTP) Servers table appears.
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