H3C Technologies H3C SecPath F1000-E - Manual (Page 120)

8
Configuring NTP Client/Server Mode
For devices working in client/server mode, make configurations on the clients, but not on the servers.
Follow these steps to configure an NTP client:
To do… Use the command… Remarks
Enter system view system-view —
Specify an NTP server for the
device
ntp-service unicast-server
[ vpn-instance
vpn-instance-name ] { ip-address |
server-name }
[ authentication-keyid keyid |
priority | source-interface
interface-type interface-number |
version number ] *
Required
No NTP server is specified by
default.
Whether the vpn-instance
keyword is supported depends on
your device model.
NOTE:
•
In the
ntp-service unicast-server command, ip-address must be a unicast address, rather than a
broadcast address, a multicast address or the IP address of the local clock.
•
When the source interface for NTP messages is specified by the source-interface argument,
the source IP address of the NTP messages is configured as the primary IP address of the
specified interface.
• A device 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.
•
You can configure multiple servers by repeating the
ntp-service unicast-server command. The
clients will select the optimal reference source.
Configuring the NTP Symmetric Peers Mode
For devices working in the symmetric mode, specify a symmetric-passive peer 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
[ vpn-instance
vpn-instance-name ] { ip-address |
peer-name }
[ authentication-keyid keyid |
priority | source-interface
interface-type interface-number |
version number ] *
Required
No symmetric-passive peer is
specified by default.
Whether the vpn-instance
keyword is supported depends on
your device model.