NOTE:
For synchronized video playback, NTP alone cannot be
relied upon for SV-4K devices and PTP must be used.
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The default NTP synchronization interval with the host time server is one hour and
is configurable.
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An NTP source must be configured in Cisco StadiumVision Director. By default,
the Cisco StadiumVision Director server is configured as the SV-4K NTP host
(just as with the Cisco DMP 4310G).
CAUTION:
If you are running Cisco StadiumVision Director on a
virtual server, then you should reference a reliable NTP server
running on a bare metal server, rather than relying on a clock from
a VM environment that can drift and is not accurate.
For more information about configuring an NTP source in Cisco StadiumVision
Director, see the
"Configuring the Cisco StadiumVision Director Server System
module in the
Cisco StadiumVision Director Server Administration
PTP Guidelines
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PTP version 2 is supported only for the SV-4K media players and applies globally
to all devices in the Cisco StadiumVision Director network when configured.
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PTP configuration includes a PTP domain and a set of master candidates:
o
PTP domain—Default is 0.
Be sure that this domain does not conflict with any other PTP domain (and
multicast addressing) in use in your network, and revise as needed. See Table
3 for more information.
o
PTP master candidates—Default is *.
This specifies that all SV-4K devices in the network are eligible as master
candidates and will go through arbitration to designate a master for their
respective subnets.
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If you revise the default PTP master candidates configuration, you must configure
one or more SV-4K devices as master candidates in a semicolon-separated list of
IP addresses for each VLAN.
A minimum of two master candidates per network is recommended.
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If there is an in-house PTP master for your network, leave the “PTP master
candidates” property value blank. However, this configuration is only supported for
venues without multiple subnets.
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