Operation Manual – NTP
H3C S3100 Series Ethernet Switches Chapter 1 NTP Configuration
1-6
NTP implementation
mode
Configuration on S3100 series switches
Broadcast mode
z Configure the local S3100 Ethernet switch to work in
NTP broadcast server mode. In this mode, the local
switch broadcasts NTP messages through the VLAN
interface configured on the switch.
z Configure the S3100 switch to work in NTP broadcast
client mode. In this mode, the local S3100 switch
receives broadcast NTP messages through the VLAN
interface configured on the switch.
Multicast mode
z Configure the local S3100 Ethernet switch to work in
NTP multicast server mode. In this mode, the local
switch sends multicast NTP messages through the
VLAN interface configured on the switch.
z Configure the local S3100 Ethernet switch to work in
NTP multicast client mode. In this mode, the local
switch receives multicast NTP messages through the
VLAN interface configured on the switch.
Caution:
z When an H3C S3100 Ethernet switch works in server mode or symmetric passive
mode, you need not to perform related configurations on this switch but do that on
the client or the symmetric-active peer.
z The NTP server mode, NTP broadcast mode, or NTP multicast mode takes effect
only after the local clock of the H3C S3100 Ethernet switch has been synchronized.
z When symmetric peer mode is configured on two Ethernet switches, to synchronize
the clock of the two switches, make sure at least one switch’s clock has been
synchronized.
1.2 NTP Configuration Tasks
Table 1-2 NTP configuration tasks
Task Remarks
Configuring NTP Implementation Modes Required
Configuring Access Control Right Optional
Configuring NTP Authentication Optional
Configuring Optional NTP Parameters Optional
Displaying NTP Configuration Optional
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