3Com Switch 7757, Configuration Manual

Page: 762 / 940

762 C
HAPTER
70: NTP C
ONFIGURATION
c
CAUTION:
■
The source IP address in an NTP packet is the address of the sending interface
specified by the ntp-service unicast-server command or the ntp-service
unicast-peer command if you provide the address of the sending interface in
these two commands.
■
Dynamic connections can only be established when a switch operates in
passive peer mode, NTP broadcast client mode, or NTP multicast client mode.
In other modes, the connections established are static.
Displaying and
Debugging NTP
After the above configuration, you can execute the display command in any view
to display the running status of the NTP configuration, and verify the effect of the
configuration.
Configuration
Example
NTP Server Mode
Configuration
Network requirements
Configure the local clock of S7750-1 to be the NTP master clock, with the stratum
being 2.
S7750-2 operates in client mode, with S7750-1 as the time server. S7750-1
operates in server mode automatically.
Disable the interface
from receiving NTP
packets ntp-service in-interface disable Optional
By default, a VLAN interface
receives NTP packets.
Return to system view quit -
Disable NTP service
globally ntp-service disable Optional
By default, the NTP service is
enabled
Table 606 Configure optional NTP parameters
Operation Command Description
Table 607 Display and debug NTP
Operation Command Description
Display the status of NTP service display ntp-service status The display
command can be
executed in any
view
Display the information about the
sessions maintained by NTP display ntp-service sessions
[ verbose ]
Display the brief information about the
NTP time servers of the reference clock
sources that the local device traces to display ntp-service trace