Switch 7700 Command reference Guide, v2.0

NTP Configuration Commands 497
starts a brief client/server mode to switch messages with a remote server for
estimating the network delay. Thereafter, the local Ethernet Switch enters
broadcast client mode and continues listening to the broadcast and synchronizes
the local clock according to the arrived broadcast message.
Example
Configure to receive NTP broadcast packets via Vlan-Interface1.
[SW7700]interface vlan-interface1
[SW7700-Vlan-Interface1]ntp-service broadcast-client
ntp-service
broadcast-server
Syntax
ntp-service broadcast-server [ authentication-keyid keyid version
number ]
undo ntp-service broadcast-server
View
VLAN interface view
Parameter
authentication-keyid: Specify the authentication key.
keyid: Key ID used in broadcast, ranging from 0 to 4294967295.
version: Define NTP version number.
number: NTP version number, ranging from 1 to 3.
Description
Using ntp-service broadcast-server command, you can configure NTP
broadcast server mode. Using
undo ntp-service broadcast-server command,
you can disable the NTP broadcast server mode.
By default, the broadcast service is disabled and number defaults to 3.
Designate an interface on the local equipment to broadcast NTP packets. The local
equipment runs in broadcast-server mode and regularly broadcasts packets to its
clients.
Example
Configure to broadcast NTP packets via Vlan-Interface1 and encrypt them with
Key 4 and set the NTP version number as 3.
[SW7700]interface vlan-interface1
[SW7700-Vlan-Interface1]ntp-service broadcast-server
authentication-key 4 version 3
ntp-service
max-dynamic sessions
Syntax
ntp-service max-dynamic-sessions number
undo ntp-service max-dynamic-sessions
View
System view