H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – NTP
H3C S7500E Series Ethernet Switches Chapter 1 NTP Configuration
1-10
 Note:
z In the ntp-service unicast-server command, ip-address must be a host address,
rather than a broadcast address, a multicast address or the IP address of the local
clock.
z When the interface sending the NTP packet is specified by the source-interface
argument, the source IP address of the NTP packet will be configured as the
primary IP address of the specified interface.
z A Switch Can act as a server to synchronize the clock of other devices only after its
clock has been synchronized. If the clock of a server has a stratum level higher than
or equal to that of a client’s clock, the client will not synchronize its clock to the
server’s.
z You can configure multiple servers by repeating the ntp-service unicast-server
command. The clients will choose the optimal reference source.
1.2.2 Configuring the NTP Symmetric Mode
For devices working in the symmetric mode, you need to specify a symmetric-passive
on a symmetric-active peer.
Following these steps to configure a symmetric-active device:
To do… Use the command… Remarks
Enter system view
system-view
—
Specify a
symmetric-passive peer
for the device
ntp-service unicast-peer
{ ip-address | peer-name }
[ authentication-keyid keyid |
priority | source-interface
interface-type interface-number |
version number ] *
Required
No
symmetric-pass
ive peer is
specified by
default.