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Table 4-11 Set an external reference clock or the local clock as the NTP master clock
Operation Command
Set an external reference clock or
the local clock as the NTP master
clock
ntp-service refclock-master
[
X.X.X.X
] [
stratum
]
Disable the NTP master clock setting
undo ntp-service refclock-master
[
X.X.X.X
]
X.X.X.X represents the IP address 127.127.t.u of reference clock. Where, t is in the
range of 0 to 37 and u in the range of 0 to 3. The argument stratum gives the stratum
(level) information of the local clock, which is in the range of 1 to 15.If no IP address
has been specified, the local clock is the NTP master clock by default. You can
specify the stratum of the NTP master clock.
4.2.7 Disable/Enable Interface to Receive NTP Messages
This task disables or enables an interface to receive NTP messages.
Perform the following configuration in interface view.
Table 4-12 Disable/Enable an interface to receive NTP messages
Operation Command
Disable an interface to receive NTP
messages
ntp-service source-interface disable
Enable the interface to receive NTP
messages
undo ntp-service source-interface disable
This task must be performed on the interface desired to be disabled in receiving NTP
messages.
4.2.8 Assign the Rights for Accessing the Local Router Service
This task sets the rights for accessing the NTP service provided by the local router.
This command provides minimum protection. If you want greater security, you can
perform authentication. Whenever receiving an access request, the router performs
the match operation to find out the access right assigned to the requestor in the
descending order of access rights, i.e., peer, server, synchronization, and query.
The match found first will be the service access right assigned to the requestor.
Perform the following configuration in system view.
3Com Router Configuration Guide Addendum for V1.20
49