3Com SuperStack 4, Руководство по настройке

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NTP Configuration 363
Table 446 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 447 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.
Setting Maximum Local Sessions
This configuration task is to set the maximum local sessions.
Perform the following configurations in System View.
Table 448 Set the Maximum Local Sessions
number
specifies the maximum number of local sessions, ranges from 0 to 100,
and defaults to 100.
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 | server | peer }
acl-number
Cancel settings of the authority
to access a local Switch
undo ntp-service access { query |
synchronization | server | peer }
Operation Command
Set the maximum local sessions
ntp-service max-dynamic-sessions
number
Resume the maximum number of
local sessions
undo ntp-service max-dynamic-sessions