Cisco TelePresence Administrator's Manual page 69

To configure the VCS with one or more NTP servers to be used when synchronizing system time, enter up to
5 NTP server addresses in one of the following formats, depending on the system's DNS settings (on the
DNS page, System > DNS):
if there are no DNS servers configured , you must use an IP address
n
if there are one or more DNS servers configured, you can use an FQDN or IP address
n
if there is a DNS Domain name configured in addition to one or more DNS servers, you can use the
n
server address, FQDN or IP address.
The NTP server address fields default to one of three NTP servers provided by Cisco: 0.ntp.tandberg.com,
1.ntp.tandberg.com, or 2.ntp.tandberg.com.
The synchronization status between the NTP server and the VCS is shown in the Status area as follows:
Synchronized: the VCS has successfully obtained accurate system time from an NTP server.
n
Unsynchronized: the VCS is unable to obtain accurate system time from an NTP server.
n
Down: the VCS's NTP client is not running.
n
Other status information available includes:
Field Description
NTP server The actual NTP server that has responded to the request. This may be different to the NTP server in
the NTP server address field.
Condition Gives a relative ranking of each NTP server. All servers that are providing accurate time are given
a status of Candidate; of those, the server that the VCS considers to be providing the most accurate
time and is therefore using shows a status of sys.peer.
Flash A code giving information about the server's status. 00 ok means there are no issues. See the
Flash status word reference table
Reachability Indicates the results of the 8 most recent contact attempts between the VCS and the NTP server,
with a tick indicating success and a cross indicating failure. The result of the most recent attempt is
shown on the far right.
Each time the NTP configuration is changed, the NTP client is restarted and the Reachability field
will revert to all crosses apart from the far right indicator which will show the result of the first
connection attempt after the restart. However, the NTP server may have remained contactable
during the restart process.
Offset The difference between the NTP server's time and the VCS's time.
Delay The network delay between the NTP server and the VCS.
Stratum The degree of separation between the VCS and a reference clock. 1 indicates that the NTP server is
a reference clock.
Ref ID A code identifying the reference clock.
Ref time The last time that the NTP server communicated with the reference clock.
For definitions of the remaining fields on this page, and for further information about NTP, see the
Time Protocol website.
Cisco VCS Administrator Guide (X7.1)
for a complete list of codes.
Network and system settings
Network
Page 69 of 479