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498 CHAPTER 22: FILE SYSTEM MANAGEMENT
An interface is specified by interface-name or interface-type interface-number.
The source address of the packets will be taken from the IP address of the interface. If
the
ntp-service unicast-server or ntp-service unicast-peer command also
designates a transmitting interface, use the one designated by them.
Enabling/Disabling an Interface to Receive NTP Message
This configuration task is to enable/disable an interface to receive NTP message.
Perform the following configurations in VLAN interface view.
Table 573 Enable/Disable an Interface to Receive NTP Message
This configuration task must be performed on the interface to be disabled to receive
NTP message.
Setting Authority to Access a Local Switch
Set authority to access the NTP services on a local Switch. This is a basic and brief
security measure, compared to authentication. An access request will be matched
with
peer, serve, serve only, and query only in an ascending order of the
limitation. The first matched authority will be given.
Perform the following configurations in System View.
Table 574 Set Authority to Access a Local Switch
IP address ACL number is specified through the acl-number parameter and ranges
from 2000 to 2999. The meanings of other authority levels are as follows:
query: Allow control query for the local NTP service only.
synchronization: Allow request for local NTP time service only.
serve: Allow local NTP time service request and control query. However, the local
clock will not be synchronized by a remote server.
peer: Allow local NTP time service request and control query. The local clock will also
be synchronized by a remote server.
Cancel the interface to transmit
NTP message
undo ntp-service source-interface
Operation Command
Disable an interface to receive NTP message ntp-service in-interface disable
Enable an interface to receive NTP message undo ntp-service in-interface disable
Operation Command
Set authority to access a local
Switch
ntp-service access { query | synchronization |
serve | peer } acl-number
Cancel settings of the authority
to access a local Switch
undo ntp-service access { query |
synchronization | serve | peer }
Operation Command