3Com 5500-SI Configuration Manual page 498

498 C 22: F S
HAPTER ILE YSTEM
M
ANAGEMENT
Operation
Cancel the interface to transmit
NTP message
An interface is specified by
The source address of the packets will be taken from the IP address of the interface. If
the
ntp-service unicast-server
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
Operation
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
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
limitation. The first matched authority will be given.
Perform the following configurations in System View.
Table 574 Set Authority to Access a Local Switch
Operation
Set authority to access a local
Switch
Cancel settings of the authority
to access a local Switch
IP address ACL number is specified through the
from 2000 to 2999. The meanings of other authority levels are as follows:
: Allow control query for the local NTP service only.
query
: Allow request for local NTP time service only.
synchronization
: Allow local NTP time service request and control query. However, the local
serve
clock will not be synchronized by a remote server.
: Allow local NTP time service request and control query. The local clock will also
peer
be synchronized by a remote server.
Command
undo ntp-service source-interface
or
interface-name interface-type interface-number
or
ntp-service unicast-peer
Command
, and in an ascending order of the
query only
Command
ntp-service access { query | synchronization |
serve | peer } acl-number
undo ntp-service access { query |
synchronization | serve | peer }
acl-number
command also
parameter and ranges
.