H3C Technologies H3C S6300 Series Switches - Manual (Page 77)

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Step Command Remarks
3. Configure the protocol for
encapsulating PTP messages
as UDP (IPv4).
ptp transport-protocol udp
By default, PTP messages are
encapsulated in IEEE
802.3/Ethernet packets.
Specifying the source IP address for UDP packets
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view. ptp source ip-address
By default, no source IP address is
specified for PTP messages
encapsulated in UDP packets.
Configuring the delay correction value
PTP performs time synchronization based on the assumption that the delays in sending and receiving
messages are the same. However, this is not practical. If you know the offset between the delays in
sending and receiving messages, you can configure the delay correction value for more accurate time
synchronization.
To configure the delay correction value for every clock node:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2 Ethernet
interface view. interface interface-type
interface-number
N/A
3. Configure delay correction
value.
ptp asym-correction { minus |
plus } value
Optional.
The default is 0 nanoseconds,
which means delay correction is
not performed.
Configuring the cumulative offset between the UTC and TAI
The time displayed on a device is based on the Coordinated Universal Time (UTC). There is an offset
between UTC and TAI (International Atomic Time in English), which is made public periodically. This task
allows you to adjust the offset between the UTC and TAI on the device. It is applicable to the GM only.
To configure the cumulative offset between the UTC and TAI:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the cumulative
offset between the UTC and
TAI.
ptp utc offset utc-offset The default is 0 seconds.