Configuring Time Settings - Cisco TelePresence Administrator's Manual

Network and system settings
Note: SNMP is disabled by default, because of the potentially sensitive nature of the information involved.
Do not enable SNMP on a VCS on the public internet or in any other environment where you do not want to
expose internal system information.

Configuring time settings

The Time page (System >
zone.
An NTP server is a remote server with which the VCS synchronizes in order to ensure its time is accurate.
The NTP server provides the VCS with UTC time.
Accurate time is necessary for correct system operation.
Configuring the NTP servers
To configure the VCS with one or more NTP servers to be used when synchronizing system time, enter the
Address of up to five servers in one of the following formats, depending on the system's DNS settings (you
can check these settings on the
if there are no DNS servers configured, you must use an IP address for the NTP server
n
if there are one or more DNS servers configured, you can use an FQDN or IP address for the NTP server
n
if there is a DNS Domain name configured in addition to one or more DNS servers, you can use the
n
server name, FQDN or IP address for the NTP server
Three of the Address fields default to NTP servers provided by Cisco.
You can configure the Authentication method used by the VCS when connecting to an NTP server. Use one
of the following options for each NTP server connection:
Authentication Description
method
Disabled No authentication is used.
Symmetric key Symmetric key authentication. When using this method a Key ID, Hash method and Pass
phrase must be specified. The values entered here must match exactly the equivalent settings
on the NTP server. You can use the same symmetric key settings across multiple NTP servers.
However, if you want to configure each server with a different pass phrase, you must also ensure
that each server has a unique key ID.
Private key Private key authentication. This method uses an automatically generated private key with which
to authenticate messages sent to the NTP server.
Displaying NTP status information
The synchronization status between the NTP server and the VCS is shown in the
Starting: the NTP service is starting.
n
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
Reject: the NTP service is not accepting NTP responses.
n
Cisco VCS Administrator Guide (X8.1.1)
Time) is used to configure the VCS's NTP servers and to specify the local time
DNS page, System > DNS):
Network services
Status area as follows:
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