H3C Technologies H3C S7500E Series Switches - Manual (Page 77)

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To do… Use the command… Remarks
Configure the device to work in
the NTP multicast server mode
ntp-service multicast-server
[ ip-address ]
[ authentication-keyid keyid |
ttl ttl-number | version number ]
*
Required
z A multicast server can synchronize broadcast clients only after its clock has been
synchronized.
z You can configure up to 254 multicast clients, among which 128 can take effect at the same
time.
Configuring the Local Clock as a Reference Source
A network device can get its clock synchronized in one of the following two ways:
z Synchronized to the local clock, which works as the reference source.
z Synchronized to another device on the network in any of the four NTP operation modes
previously described.
If you configure two synchronization modes, the device will choose the optimal clock as the
reference source.
Follow these steps to configure the local clock as a reference source:
To do… Use the command… Remarks
Enter system view system-view —
Configure the local clock as a
reference source
ntp-service refclock-master
[ ip-address ] [ stratum ]
Required