R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

58
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. 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 ] *
By default, no NTP server is
specified.
You can configure multiple servers
by repeating the command. The
clients will select the optimal
reference source.
Configuring the NTP symmetric peers mode
Follow these guidelines when you configure the NTP symmetric peers mode:
• For devices operating in symmetric mode, specify a symmetric-passive peer on a symmetric-active
peer.
• Use the ntp-service refclock-master command or any NTP configuration command in Configuring
NTP ope
ration modes to enable NTP. Otherwise, a symmetric-passive peer does not process NTP
messages from a symmetric-active peer.
• Either the symmetric-active peer or the symmetric-passive peer must be in synchronized state.
Otherwise, clock synchronization does not proceed.
• After you specify the source interface for NTP messages by specifying the source interface
source-interface option, the source IP address of the NTP messages is set as the primary IP address
of the specified interface.
To specify a symmetric-passive peer on the active peer:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. 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 ] *
By default, no symmetric-passive
peer is specified.
The ip-address argument must be a
unicast address, rather than a
broadcast address, a multicast
address, or the IP address of the
local clock.
Configuring NTP broadcast mode
The broadcast server periodically sends NTP broadcast messages to the broadcast address
255.255.255.255. After receiving the messages, the device operating in NTP broadcast client mode
sends a reply and synchronizes its local clock.
Configure the NTP broadcast mode on both the server and clients. The NTP broadcast mode can only be
configured in a specific interface view because an interface needs to be specified on the broadcast
server for sending NTP broadcast messages and on each broadcast client for receiving broadcast
messages.