3Com Switch 8800 Configuration Guide
Chapter 49 NTP Configuration
49-8
ntp-service
unicast-server
or
ntp-service
unicast-peer
command also designates a
transmitting interface, use the one designated by them.
49.2.6 Setting NTP Master Clock
This configuration task is to set the external reference clock or the local clock as the
NTP master clock.
Perform the following configuration in system view.
Table 49-11
Set the external reference clock or the local clock as the NTP master clock
Operation
Command
Set the external reference clock or the
local clock as the NTP master clock.
ntp-service refclock-master
[
ip
-
address
] [
stratum
]
Cancel the NTP master clock settings
undo ntp-service refclock-master
[
ip
-
address
]
ip
-
address
specifies the IP address 127.127.1.u of a reference clock, in which u ranges
from 0 to 3.
stratum
specifies how many stratums the local clock belongs to and ranges
from 1 to 15.
The IP address defaults 127.127.1.0, and the stratum defaults to 8.
49.2.7 Setting Authority to Access a Local Ethernet Switch
Set authority to access the NTP services on a local Ethernet Switch. This is a basic and
brief security measure, compared to authentication. An access request will be matched
with
peer
,
server
,
server only
, and
query only
in an ascending order of the limitation.
The first matched authority will be given.
Perform the following configuration in system view.
Table 49-12
Set authority to access a local Ethernet switch
Operation
Command
Set authority to access a local
Ethernet switch
ntp-service access
{
query
|
synchronization
|
server
|
peer
}
acl
-
number
Cancel settings of the authority to
access a local Ethernet switch
undo ntp-service access
{
query
|
synchronization
|
server
|
peer
}
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.
