300
C
HAPTER
35: NTP C
ONFIGURATION
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 S4200G 1 to be NTP master clock, with the stratum being
2.
S4200G1 is a switch that allows the local clock to be the master clock.
A S4200G 1 series switch operates in client mode, with S4200G2 as the time server.
S4200G 2 operates in server mode automatically.
The 1, 2, 3, etc. destinations in the switch names are for explanation purposes only
and are not part of the command structure.
Disable the interface
from receiving NTP
packets
ntp-service in-interface disable
Optional
By default, a VLAN interface
receives NTP packets.
Display the session
information maintained
by the NTP services
display ntp-service sessions
[
verbose ]
This command can be executed in
any view.
Table 261
Configure optional NTP parameters (Continued)
Operation
Command
Description
Table 262
Display and debug NTP
Operation
Command
Display the status of NTP service
display ntp-service status
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
Summary of Contents for 4200G 12-Port
Page 10: ...8 CONTENTS...
Page 14: ...4 ABOUT THIS GUIDE...
Page 46: ...32 CHAPTER 5 LOGGING IN THROUGH WEB BASED NETWORK MANAGEMENT SYSTEM...
Page 48: ...34 CHAPTER 6 LOGGING IN THROUGH NMS...
Page 60: ...46 CHAPTER 9 VLAN CONFIGURATION...
Page 64: ...50 CHAPTER 10 MANAGEMENT VLAN CONFIGURATION...
Page 80: ...66 CHAPTER 13 GVRP CONFIGURATION...
Page 98: ...84 CHAPTER 15 LINK AGGREGATION CONFIGURATION...
Page 112: ...98 CHAPTER 18 MAC ADDRESS TABLE MANAGEMENT...
Page 126: ...112 CHAPTER 19 LOGGING IN THROUGH TELNET...
Page 162: ...148 CHAPTER 20 MSTP CONFIGURATION...
Page 274: ...260 CHAPTER 29 IGMP SNOOPING CONFIGURATION...
Page 276: ...262 CHAPTER 30 ROUTING PORT JOIN TO MULTICAST GROUP CONFIGURATION...
Page 298: ...284 CHAPTER 33 SNMP CONFIGURATION...
Page 304: ...290 CHAPTER 34 RMON CONFIGURATION...
Page 338: ...324 CHAPTER 36 SSH TERMINAL SERVICES...
Page 356: ...342 CHAPTER 38 FTP AND TFTP CONFIGURATION...
Page 365: ...Information Center Configuration Example 351 S4200G terminal logging...
Page 366: ...352 CHAPTER 39 INFORMATION CENTER...
Page 378: ...364 CHAPTER 40 BOOTROM AND HOST SOFTWARE LOADING...
Page 384: ...370 CHAPTER 41 Basic System Configuration and Debugging...
Page 388: ...374 CHAPTER 43 NETWORK CONNECTIVITY TEST...
Page 406: ...392 CHAPTER 45 CONFIGURATION OF NEWLY ADDED CLUSTER FUNCTIONS...