Configuration Procedure - 3Com 4200G 12-Port Configuration Manual

In addition, for the server/client mode and the symmetric peer mode, you need to associate a
specific key on the client (the symmetric-active peer in the symmetric peer mode) with the
corresponding NTP server (the symmetric-passive peer in the symmetric peer mode); for the NTP
broadcast/multicast mode, you need to associate a specific key on the broadcast/multicast server
with the corresponding NTP broadcast/multicast client. Otherwise, NTP authentication cannot be
enabled normally.
Configurations on the server and the client must be consistent.

Configuration Procedure

Configuring NTP authentication on the client
Follow these steps to configure NTP authentication on the client:
To do...
Enter system view
Enable the NTP authentication
function
Configure the NTP
authentication key
Configure the specified key as
a trusted key
Associat
Configure on the
e the
client in the
specified
server/client mode
key with
the
Configure on the
correspo
symmetric-active
nding
peer in the
NTP
symmetric peer
server
mode
NTP authentication requires that the authentication keys configured for the server and the client be the
same. Besides, the authentication keys must be trusted keys. Otherwise, the clock of the client cannot
be synchronized with that of the server.
Configuring NTP authentication on the server
Follow these steps to configure NTP authentication on the server:
To do...
Enter system view
Use the command...
system-view
ntp-service authentication
enable
ntp-service
authentication-keyid key-id
authentication-model md5
value
ntp-service reliable
authentication-keyid key-id
ntp-service unicast-server
{ remote-ip | server-name }
authentication-keyid key-id
ntp-service unicast-peer
{ remote-ip | peer-name }
authentication-keyid key-id
Use the command...
system-view
1-12
Remarks
—
Required
Disabled by default.
Required
By default, no NTP
authentication key is
configured.
Required
By default, no trusted key is
configured.
Required
For the client in the NTP
broadcast/multicast mode,
you just need to associate the
specified key with the client
on the corresponding server.
Remarks
—