H3c-technologies H3C WX5500E Series Access Controllers Manuel d'utilisateur télécharger pdf (Page 39)

# Display NTP session information for Switch A, which shows that an association has been set up

between Switch A and the device.

[SwitchA-Vlan-interface3] display ntp-service sessions

source reference stra reach poll now offset delay disper

**************************************************************************

[1234] 3.0.1.31 127.127.1.0 2 255 64 26 -16.0 40.0 16.6

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured

Total associations : 1

Configuration example for NTP client/server mode with

authentication

Network requirements

As shown in Figure 15, perform the following configurations to synchronize the time between Device B

and Device A and ensure network security.

• The local clock of Device A is to be configured as a reference source, with the stratum level 2.

• Device B operates in client mode and Device A is to be used as the NTP server of Device B, with

Device B as the client.

• NTP authentication is to be enabled on both Device A and Device B.

Figure 15 Network diagram

Configuration procedure

1. Set the IP address for each interface as shown in Figure 15. (Details not shown.)

2. Configure Device B:

<DeviceB> system-view

# Enable NTP authentication on Device B.

[DeviceB] ntp-service authentication enable

# Set an authentication key.

[DeviceB] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey

# Specify the key as a trusted key.

[DeviceB] ntp-service reliable authentication-keyid 42

# Specify Device A as the NTP server of Device B.

[DeviceB] ntp-service unicast-server 1.0.1.11 authentication-keyid 42

Before Device B can synchronize its clock to that of Device A, enable NTP authentication for

Device A.

Perform the following configuration on Device A:

# Enable NTP authentication.

[DeviceA] ntp-service authentication enable

# Set an authentication key.

[DeviceA] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey

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H3c-technologies H3C WX5500E Series Access Controllers Manuel d'utilisateur Page 39