3Com MSR 30, MSR 50 Ntp-service access, Undo ntp-service access peer query server synchronization

2304 CHAPTER 152: NTP CONFIGURATION COMMANDS

Table 607 Description on the fields of the display ntp-service trace command

Field	Description
server	IP address of the NTP server
stratum	The stratum level of the corresponding system clock
offset	The clock offset relative to the upper-level clock
synch distance	The synchronization distance relative to the upper-level clock
refid	Identifier of the primary reference source. When the stratum level of the
	primary reference clock is 0, it is displayed as LOCL; otherwise, it is
	displayed as the IP address of the primary reference clock.

ntp-service access

Syntax	ntp-service access { peer query server synchronization } acl-number
	undo ntp-service access { peer query server synchronization }
View	System view
Parameter	peer: Specifies to permit full access.
	query: Specifies to permit control query.
	server: Specifies to permit server access and query.
	synchronization: Specifies to permit server access only.
	acl-number: Basic ACL number, in the range of 2000 to 2999.
Description	Use the ntp-service access command to configure the NTP service
	access-control right to the local device.
	Use the undo ntp-service access command to remove the configured NTP
	service access-control right to the local device.
	By default, the local NTP service access-control right is set to peer.
	From the highest NTP service access-control right to the lowest one are peer,
	server, synchronization, and query. When a device receives an NTP request, it
	will perform an access-control right match and will use the first matched right.
n	■ The ntp-service access command provides only a minimum degree of security
	protection. A more secure method is identity authentication.
	■ Before specifying an ACL number in the ntp-service access command, make
	sure you have already created and configured this ACL.
Example	# Configure devices on the subnet 10.10.0.0/16 to have the full access right to the
	local device.
	<Sysname> system-view
	[Sysname] acl number 2001