3Com Switch 7750 Configuration Guide Guide

NTP Implementation Mode Configuration 699
NTP Implementation
Mode Configuration
A switch can operate in the following NTP modes:
■ NTP client mode
■ NTP server mode
■ NTP peer mode
■ NTP broadcast server mode
■ NTP broadcast client mode
■ NTP multicast server mode
■ NTP multicast client mode
Prerequisites When The Switch 7750 Family operates in NTP server mode or NTP peer mode,
you need to perform configuration on the client or the active peer only. When the
Switch 7750 Family operates in NTP broadcast mode or NTP multicast mode, you
need to configure both the server side and the client side.
Configuring NTP
Implementation Modes
Broadcast mode
■ Configure the Switch 7750 Family to
operate in NTP broadcast server mode. In
this case, the Switch 7750 Family
broadcasts NTP packets through the VLAN
interface configured on the switch.
■ Configure the Switch 7750 Family to
operate in NTP broadcast client mode. In
this case, the Switch 7750 Family receives
broadcast NTP packets through the VLAN
interface configured on the switch.
Multicast mode
■ Configure the Switch 7750 Family to
operate in NTP multicast server mode. In
this case, the Switch 7750 Family sends
multicast NTP packets through the VLAN
interface configure on the switch.
■ Configure the Switch 7750 Family to
operate in NTP multicast client mode. In
this case, the Switch 7750 Family receives
multicast NTP packets through the VLAN
interface configure on the switch.
Table 542 NTP implementation modes on the Switch 7750 Family
NTP implementation mode Configuration on Switch 7750 Family
Table 543 Configure NTP implementation modes
Operation Command Description
Enter system view system-view -
Configure to operate in the
NTP client mode
ntp-service unicast-server {
remote-ip | server-name } [
authentication-keyid key-id
| priority | source-interface
interface -type
interface-number | version
number ]*
Optional
By default, no Ethernet switch
operates in the NTP client
mode