3Com Switch 7750 Configuration Guide Guide

Configuration of Optional NTP Parameters 703
Configuring NTP authentication on the server
n
The procedures for configuring NTP authentication on the server are the same as
that on the client. Besides, the client and the server must be configured with the
same authentication key.
Configuration of
Optional NTP
Parameters
The configurations of optional NTP parameters are:
■ Setting the local clock as the NTP master clock
■ Configuring the local VLAN interface that sends NTP packets
■ Configuring the number of the dynamic sessions that can be established locally
■ Disabling the VLAN interface configured on a switch from receiving NTP
packets
■ Disabling NTP service globally
Table 546 Configure NTP authentication on the server
Operation Command Description
Enter system view system-view -
Enable NTP authentication
ntp-service authentication
enable
Required
By default, NTP authentication
is disabled
Configure NTP authentication
key
ntp-service
authentication-keyid key-id
authentication-model md5
value
Required
By default, NTP authentication
key is not configured
Configure the specified key to
be a trusted key
ntp-service reliable
authentication-keyid key-id
Required
By default, an authentication
key is not a trusted key
Enter VLAN interface view
interface interface-type
interface-number
-
Associate a specified key with
the corresponding NTP server
Broadcast server mode:
ntp-service
broadcast-server
authentication-keyid key-id
■ In NTP broadcast server
mode and NTP multicast
server mode, you need to
associate the specified key
with the corresponding
NTP server on the server
■ You can associate an NTP
server with an
authentication key while
configuring a switch to
operate in a specific NTP
mode. You can also
associate them using this
command after
configuring the NTP mode
where a switch is to
operate
Multicast server mode:
ntp-service
multicast-server
authentication-keyid key-id
Table 547 Configure optional NTP parameters
Operation Command Description
Enter system view system-view -