94
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
source interface-type interface-number: Specifies the source interface from which NTP packets are sent
for tracing back from the reference source to the primary reference source. The source IP address of the
NTP packets is the IPv4/IPv6 address of the specified source interface. If the IP address of an NTP server
is a link-local address, the link-local address of the outgoing interface of NTP packets is used as the
source IP address of the NTP packets.
Usage guidelines
To trace back to the primary reference source from the source interface, make sure the source interface
and the NTP servers from the reference source to the primacy reference source are reachable to each
other.
Examples
# Display brief information about each NTP server from the reference source back to the primary
reference source.
<Sysname> display ntp-service trace
Server 127.0.0.1
Stratum 3, jitter 0.000, synch distance 0.0000.
Server 3000::32
Stratum 2 , jitter 790.00, synch distance 0.0000.
RefID 127.127.1.0
The output shows that server 127.0.0.1 is synchronized to server 3000::32, and server 3000::32 is
synchronized to the local clock.
Table 18 Command output
Field Descri
tion
Server IP address of the NTP server.
Stratum Stratum level of the NTP server.
jitter
Root mean square (RMS) value of the clock offset relative to the upper-level clock, in
seconds.
synch distance
Synchronization distance relative to the upper-level NTP server, in seconds,
calculated from dispersion and roundtrip delay values.
RefID
Identifier of the primary reference source. When the stratum level of the primary
reference clock is 0, it is displayed as LOCL. Otherwise, it is displayed as the IP
address of the primary reference clock.
ntp-service acl
Use ntp-service acl to configure the access-control right for peer devices to access NTP services of the
local device.
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