Operation Manual – NTP
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 1
NTP Configuration
1-11
Note:
z NTP authentication requires that the authentication keys configured for the server
and the client are the same. Besides, the authentication keys must be trusted keys.
Otherwise, the client cannot be synchronized with the server.
z In NTP server mode and NTP peer mode, you need to associate the specified key
with the corresponding NTP server (active peer) on the client (passive peer). In
these two modes, multiple servers (active peers) may be configured for a
client/passive peer, and therefore, the authentication key is required to determine
which server the client is synchronized to.
II. Configuring NTP authentication on the server
Table 1-5 Configure NTP authentication on the server
Operation Command Description
Enter system view
system-view
—
Enable NTP
authentication
ntp-service authentication
enable
Required
By default, the NTP
authentication function is
disabled.
Configure an NTP
authentication key
ntp-service
authentication-keyid key-id
authentication-mode md5
value
Required
By default, no NTP
authentication key is
configured.
Configure the
specified key to be
a trusted key
ntp-service reliable
authentication-keyid key-id
Required
By default, no trusted
authentication key is
configured.
Enter VLAN
interface view
interface Vlan-interface
vlan-id
—
Broadcast server mode:
ntp-service
broadcast-server
authentication-keyid key-id
Associate the
specified key with
the corresponding
NTP server
Multicast server mode:
ntp-service
multicast-server
authentication-keyid key-id
z 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
z You can associate an NTP
server with an
authentication key while
configuring NTP mode.
You can also use this
command to associate
them after configuring the
NTP mode.
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