D-Link xStack DGS-3420 Series, Справочное руководство

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xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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Has multiple Precision Time Protocol (PTP) ports in a domain and maintains the timescale
used in the domain.
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Can serve as the time source and can synchronize with another clock.
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Device type can choose to use the delay request-response mechanism or the peer delay
mechanism to measure the propagation delay between the PTP ports.
A clock that provides Precision Time Protocol (PTP) event transit time information also provides
corrections for the propagation 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.
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.
Format
config ptp mode [boundary | p2p_transparent | e2e_transparent]
Parameters
boundary - Specifies the Switch as a Boundary Clock.
p2p_transparent - Specifies the Switch as a Peer-to-Peer Transparent Clock.
e2e_transparent - Specifies the Switch as an End-to-End Transparent Clock.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To specify the switch as a peer-to-peer transparent clock:
DGS-3420-28SC:admin# config ptp mode p2p_transparent
Command: config ptp mode p2p_transparent
Success.
DGS-3420-28SC:admin#
71-4 config ptp transport protocol
Description
This command is used to specify the transport protocol that will be used for the communication path.
Format
config ptp transport protocol [ethernet | udp]