3Com Switch 8800 Family Configuration Guide

756 CHAPTER 66: NTP CONFIGURATION
Configuring NTP Server Mode
Set a remote server whose ip address is ip-address as the local time server.
ip-address specifies a host address other than a broadcast, multicast or reference
clock IP address. In this case, the local Switch operates in Client mode. In this
mode, only the local client synchronizes its clock with the clock of the remote
server, while the reverse synchronization will not happen.
Perform the following configuration in system view.
NTP version number number ranges from 1 to 3 and defaults to 3; it supports
authentication but will not be the first choice for time server..
Configuring NTP Peer Mode
Set a remote server whose ip address is ip-address as the peer of the local
equipment. In this case, the local equipment operates in Symmetric Active mode.
ip-address specifies a host address other than a broadcast, multicast or reference
clock IP address. In this mode, both the local Switch and the remote server can
synchronize their clocks with the clock of opposite end.
Perform the following configuration in system view.
NTP version number number ranges from 1 to 3 and defaults to 3; it does not
support authentication and will not be the first choice for time server.
Configuring NTP Broadcast Server Mode
Designate an interface on the local Switch to transmit NTP broadcast packets. In
this case, the local equipment operates in broadcast mode and serves as a
broadcast server to broadcast messages to its clients regularly.
Perform the following configuration in VLAN interface view.
Tabl e 699 Configure NTP time server
Operation Command
Configure NTP time server
ntp-service unicast-server ip-address [ version number |
authentication-keyid keyid | source-interface interface-type
interface-number | priority ]*
Cancel NTP server mode undo ntp-service unicast-server ip-address
Tabl e 700 Configure NTP peer mode
Operation Command
Configure NTP peer mode
ntp-service unicast-peer ip-address [ version number |
authentication-keyid keyid | source-interface interface-type
interface-number | priority ]*
Cancel NTP peer mode undo ntp-service unicast-peer ip-address
Tabl e 701 Configure NTP broadcast server mode
Operation Command
Configure NTP broadcast server
mode
ntp-service broadcast-server [ authentication-keyid
keyid version number ]*
Cancel NTP broadcast server mode undo ntp-service broadcast-server