3Com 10014298 Setting the Authority to Access a Local Switch, Setting Maximum Local Sessions

NTP 285

Setting the Authority to Access a Local Switch

Set the authority to access the NTP services on a local switch. This is a basic security measure. 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 granted.

Perform the following configurations in system view.

Table 331 Setting the Authority to Access a Local Ethernet Switch

Operation	Command
Set authority to access a local Ethernet switch	ntp-service access { query
	synchronization serve peer }
	acl-number

Cancel settings of the authority to access a local Ethernet switch

undo ntp-service access { query synchronization serve peer }

IP address ACL number is specified through the acl-numberparameter 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. And the local clock will also be synchronized by a remote server.

Setting Maximum Local Sessions

This configuration task sets the maximum local sessions.

Perform the following configurations in system view.

Table 332 Setting the Maximum Local Sessions

Operation	Command
Set the maximum local sessions	ntp-service max-dynamic-sessions
	number
Resume the maximum number of local	undo ntp-service
sessions	max-dynamic-sessions

number specifies the maximum number of local sessions, ranges from 0 to 100, and defaults to 100.

Displaying and Debugging NTP

After completing the previous configurations, you can use the display command to show how NTP runs and verify the configurations according to the outputs. You can use the debugging command, in user view, to debug NTP. See Table 333 for the details of these commands.

Table 333 Displaying and Debugging NTP

Operation	Command
Display the status of NTP service	display ntp-service status