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404 CHAPTER 12: USING SYSTEM MANAGEMENT COMMANDS
■ Execute either ntp-service unicast-server, ntp-service unicast-peer,
ntp-service broadcast-client, ntp-service broadcast-server,
ntp-service multicast-client, and ntp-service multicast-server
commands to enable the NTP feature and open UDP port 123 at the same
time.
■ Use the undo form of one of the above six commands to disable all
implementation modes of the NTP feature and close UDP port 123 at the same
time.
display ntp-service
sessions
Syntax
display ntp-service sessions [ verbose ]
View
Any view
Parameter
verbose: Displays detailed NTP session information.
Description
Use the display ntp-service sessions command to display the information
about all the sessions maintained by local NTP services. If you do not specify the
verbose keyword, the brief information about all the sessions is displayed.
A Switch 4500 attempts to establish a connection in all NTP implementation
modes except the NTP server mode.
Example
View the status of all sessions maintained by NTP services.
<SW4500> display ntp-service sessions
source reference stra reach pollnowoffsetdelay disper
********************************************************************
[12345]1.1.1.1 127.127.1.03 377 512 178 0.040.1 22.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Table 46 Description on the fields of the display ntp-service sessions command
Field Description
source IP address of the synchronization source
reference Reference clock ID of the synchronization source
stra Stratum of the clock of the synchronization source
reach Indicates whether or not the synchronization source is reachable.
poll Polling interval in seconds, that is, the maximum interval between two
successive messages
now Time elapsing since the last NTP packet is sent
offset Clock offset
delay Network delay