DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
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Parameter Description
delay of the link. The link, in this case, is connected to the port that is
receiving the PTP event messages. Ports on peer-to-peer transparent clocks
use the peer delay mechanism to calculate the propagation delay between
PTP ports.
• E2E Transparent - Specifies the Switch as an End-to-End Transparent
Clock. An End-to-End Transparent Clock supports the use of an end-to-end
delay measurement mechanism between the slave clock and the master
clock. Ports on end-to-end transparent clocks are independent of
propagation delay mechanisms.
PTP Transport Protocol
Select the PTP transport protocol here. Options to choose from are:
• Ethernet - Specifies the transport protocol of PTP as IEEE802.3 Ethernet.
• UDP - Specifies the transport protocol of PTP as UDP over IPv4.
Click the Apply button to accept the changes made.
The fields that can be configured in PTP Clock Domain Settings are described below:
Parameter Description
Unit
Select the Switch unit that will be used for this configuration here.
PTP Clock Domain Number
Enter the PTP clock domain number here. All PTP messages, data sets, state
machines, and all other PTP entities are always associated with a particular
domain number. The range is from 0 to 127.
PTP Clock Domain Name
Enter the PTP clock domain name here. The name is used for user reference.
This name can be up to 32 characters long.
Click the Apply button to accept the changes made.
The fields that can be configured in PTP Boundary Clock Settings are described below:
Parameter Description
Priority 1
Enter the PTP boundary clock Priority 1 value here. The priority 1 attribute is used
in the execution of the Best Master Clock algorithm. A lower value takes
precedence. Zero indicates the highest precedence. The range is from 0 to 255.
Priority 2
Enter the PTP boundary clock Priority 2 value here. The priority 2 attribute is used
in the execution of the Best Master Clock algorithm. A lower value takes
precedence. In the event that the BMC algorithm fails to order the clocks based
on the values of priority 1, the clock’s class, and the clock’s accuracy; the priority
2 attribute will allow the creation of lower values compared to the other devices.
Zero indicates the highest precedence. The range is from 0 to 255.
Click the Apply button to accept the changes made.
When the stacking mode is enabled and the member ports of the trunk group exist in different stack units, the PTP
function may not function properly.
For example:
• The PTP feature will function properly when the member ports receive and send PTP messages on the same
stacked unit.
• The PTP feature will not function properly when the member ports receive and send PTP messages on different
stacked units.
Therefore, it is recommended not to enable the PTP feature on a trunk group that exists in different stack units.
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