GE C30 Instruction Manual page 163

5 SETTINGS
setting disabled, the relay will use clocks without the power profile identification when no power profile clocks are pres-
ent, and will use ports even if the peer delay mechanism is non-operational.
• This setting applies to all of the relay's PTP capable ports.
PTP DOMAIN NUMBER
• This setting should be set to the domain number of the grandmaster-capable clock(s) to be synchronized to. A net-
work may support multiple time distribution domains, each distinguished with a unique domain number. More com-
monly, there is a single domain using the default domain number zero.
• This setting applies to all of the relay's PTP capable ports.
PTP VLAN PRIORITY
• This setting selects the value of the priority field in the 802.1Q VLAN tag in request messages issued by the relay's
peer delay mechanism. In compliance with PP the default VLAN priority is 4, but it is recommended that in accordance
with PTP it be set to 7.
• Depending on the characteristics of the device to which the relay is directly linked, VLAN Priority may have no effect.
• This setting applies to all of the relay's PTP capable ports.
PTP VLAN ID
• This setting selects the value of the ID field in the 802.1Q VLAN tag in request messages issued by the relay's peer
delay mechanism. It is provided in compliance with PP. As these messages have a destination address that indicates
they are not to be bridged, their VLAN ID serves no function, and so may be left at its default value.
• Depending on the characteristics of the device to which the relay is directly linked, VLAN ID may have no effect.
• This setting applies to all of the relay's PTP capable ports.
c) SNTP PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 SNTP PROTOCOL

MESSAGE
MESSAGE
The C30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the C30 can obtain clock time
over an Ethernet network. The C30 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a ded-
icated product using a GPS receiver to provide an accurate time. Unicast SNTP is supported. The UR-series relays do not
support the broadcast, multicast or anycast SNTP functionality.
The setting enables or disabled the SNTP feature on the C30.
SNTP FUNCTION
To use SNTP,
SNTP SERVER IP ADDR
is "Enabled", the C30 attempts to obtain time values from the SNTP/NTP server. Since many time values are
FUNCTION
obtained and averaged, it generally takes three to four minutes until the C30 clock is closely synchronized with the SNTP/
NTP server. It takes up to two minutes for the C30 to signal an SNTP self-test error if the server is offline.
The
SNTP UDP PORT NUMBER
When the
SNTP UDP PORT NUMBER
NOTE
GE Multilin
 
REAL TIME CLOCK
SNTP FUNCTION:
Disabled
SNTP SERVER IP ADDR:
0.0.0.0
SNTP UDP PORT
NUMBER: 123
must be set to the SNTP/NTP server IP address. Once this address is set and
is 123 for normal SNTP operation. If SNTP is not required, close the port by setting it to 0.
is set to 0, the change takes effect when the C30 is restarted.
C30 Controller System
SNTP PROTOCOL
Range: Enabled, Disabled
Range: Standard IP address format
Range: 0 to 65535 in steps of 1
5.2 PRODUCT SETUP
5
SNTP
5-47