Configuring Access Control Right - 3Com 4210 PWR Configuration Manual

Configuring Access
Control Right
Configuration
Prerequisites
Configuration Procedure
Configuring a switch to work in the multicast client mode
Table 288 Configure a switch to work in the NTP multicast client mode
Operation
Enter system view
Enter VLAN interface view
Configure the switch to work
in the NTP multicast client
mode
With the following command, you can configure the NTP service access-control
right to the local switch for a peer device. There are four access-control rights, as
follows:
query: Control query right. This level of right permits the peer device to
■
perform control query to the NTP service on the local device but does not
permit the peer device to synchronize its clock to the local device. The so-called
"control query" refers to query of state of the NTP service, including alarm
information, authentication status, clock source information, and so on.
synchronization: Synchronization right. This level of right permits the peer
■
device to synchronize its clock to the local switch but does not permit the peer
device to perform control query.
server: Server right. This level of right permits the peer device to perform
■
synchronization and control query to the local switch but does not permit the
local switch to synchronize its clock to the peer device.
peer: Peer access. This level of right permits the peer device to perform
■
synchronization and control query to the local switch and also permits the local
switch to synchronize its clock to the peer device.
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 in this order and use the first matched
right.
Prior to configuring the NTP service access-control right to the local switch for peer
devices, you need to create and configure an ACL associated with the
access-control right. To configure an ACL, refer to "ACL Configuration" on
page 291.
Table 289 Configure the NTP service access-control right to the local device for peer
devices
Operation
Enter system view
Configure the NTP service
access-control right to the
local switch for peer devices

Configuring Access Control Right

Command
system-view
interface Vlan-interface
vlan-id
ntp-service multicast-client
[ ip-address ]
Command...
system-view
ntp-service access { peer |
server | synchronization |
query } acl-number
375
Description
-
-
Required
Not configured by default.
Description
-
Optional
peer by default