H3C Technologies H3C S3100 Series Switches - Manual (Page 468)

Operation Manual – NTP
H3C S3100-52P Ethernet Switch Chapter 1 NTP Configuration
1-6
NTP
implementation Configuration on S3100-52P switch
mode
Broadcast mode
z
Configure the local S3100-52P Ethernet switch to
operate in NTP broadcast server mode. In this mode, the
local switch broadcasts NTP packets through the VLAN
interface configured on the switch.
z
Configure the S3100-52P switch to operate in NTP
broadcast client mode. In this mode, the local S3100-52P
switch receives broadcast NTP packets through the
VLAN interface configured on the switch.
Multicast mode
z
Configure the local S3100-52P Ethernet switch to
operate in NTP multicast server mode. In this mode, the
local switch sends multicast NTP packets through the
VLAN interface configured on the switch.
z
Configure the local S3100-52P Ethernet switch to
operate in NTP multicast client mode. In this mode, the
local switch receives multicast NTP packets through the
VLAN interface configured on the switch.
Caution:
An S3100-52P Ethernet switch can operate in the NTP peer, NTP broadcast server, or
NTP multicast server mode only after its clock is synchronized.
1.2 Configuring NTP Implementation Modes
An S3100-52P Ethernet switch can operate in one of the following NTP modes:
z
NTP client mode
z
NTP server mode
z
NTP peer mode
z
NTP broadcast server mode
z
NTP broadcast client mode
z
NTP multicast server mode
z
NTP multicast client mode
1.2.1 Configuration Prerequisites
You need to perform configurations only on the client (or the active peer) when you
want an S3100-52P Ethernet switch to operate in NTP server mode (or NTP peer
mode). However, you need to perform configurations on both the server and client
when you want the switch to operate in NTP broadcast mode or NTP multicast mode.