3Com 5500-EI PWR, Справочное руководство

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NTP Configuration Commands
To protect unused sockets against attacks by malicious users and improve security, 3Com S5500-EI
series Ethernet switches provide the following functions:
z
UDP port 123 is opened only when the NTP feature is enabled.
z
UDP port 123 is closed as the NTP feature is disabled.
These functions are implemented as follows:
z
Execution of one of the 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 enables the NTP feature and opens UDP port 123 at the same time.
z
Execution of the undo form of one of the above six commands disables all implementation modes
of the NTP feature and closes UDP port 123 at the same time.
NTP Configuration Commands
display ntp-service sessions
Syntax
display ntp-service sessions [ verbose ]
View
Any view
Parameters
verbose : Displays the detailed information about all the sessions maintained by the NTP service.
Without this keyword, the command displays the brief information about all the sessions
Description
Use the display ntp-service sessions command to display the information about all the sessions
maintained by local NTP services.