User Guide

26
To add a Unicast SNTP server:
1. Click
Configuration > System Management > Time > SNTP Unicast Server
.
This page displays the following information for each Unicast SNTP server:
•
SNTP Server—SNTP server IP address. The preferred server, or hostname, is
chosen according to its stratum level.
•
SNTP Server Status—SNTP server status. The possible values are:
-
Up—SNTP server is currently operating normally.
-
Down—SNTP server is currently not available.
-
Unknown—SNTP server is currently being searched for by the device.
-
In Process—Occurs when the SNTP server does not fully trust its own time
server (i.e. when first booting up the SNTP server).
•
Stratum Level—Distance from the reference clock expressed as a numerical value.
An SNTP server cannot be the primary server (stratum level 1) unless polling
interval is enabled.
•
Offset—Estimated offset of the server's clock relative to the local clock, in
milliseconds. The host determines the value of this offset using the algorithm
described in RFC 2030.
•
Delay—Estimated round-trip delay of the server's clock relative to the local clock
over the network path between them, in milliseconds. The host determines the
value of this delay using the algorithm described in RFC 2030.
•
Poll Interval—Displays whether polling is enabled or disabled.
•
Authentication Key ID—Key Identification used to communicate between the
SNTP server and device.
•
Last Response Time—Last date and time a response was received from this SNTP
server.
2. To add a Unicast SNTP server, enable SNTP Client Unicast.
3. Click Add.
4. Enter the following parameters:
•
SNTP Server—Select if the SNTP server is going to be identified by its IP address
or if you are going to select a well-known SNTP server by name from the list.
Note—
To specify a well-known SNTP server, the device must be connected to the
internet and configured with a DNS server or configured so that a DNS server is
identified by using DHCP. (See
Domain Name System
in Chapter 11.)
•
IP Version—Select the version of the IP address: Version 6 or Version 4.
•
IPv6 Address Type—Select the IPv6 address type (if IPv6 is used). The options are