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HP VPN Firewall Appliances System Management and Maintenance Configuration Guide

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Configuring the 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.
To configure a broadcast client:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
This command enters the view of
the interface for sending NTP
broadcast messages.
3. Configure the device to
operate in NTP broadcast
client mode.
ntp-service broadcast-client N/A
To configure the broadcast server:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
This command enters the view of
the interface for sending NTP
broadcast messages.
3. Configure the device to
operate in NTP broadcast
server mode.
ntp-service broadcast-server
[ authentication-keyid keyid |
version number ] *
A broadcast server can
synchronize broadcast clients only
when its clock has been
synchronized.
Configuring the NTP multicast mode
The multicast server periodically sends NTP multicast messages to multicast clients, which send replies
after receiving the messages and synchronize their local clocks.
Configure the NTP multicast mode on both the server and clients. The NTP multicast mode must be
configured in a specific interface view.
To configure a multicast client:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
This command enters the view of
the interface for sending NTP
multicast messages.