R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

# Display the NTP session information of Router A, which shows that an association has been set

up between Router A and Router C.

[RouterA-GigabitEthernet2/0/1] display ntp-service sessions

source reference stra reach poll now offset delay disper

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[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

For more information about how to configuration IGMP and PIM, see IP Multicast Configuration Guide.

Configuration example for NTP client/server mode with

authentication

Network requirements

As shown in Figure 30, perform the following configurations to synchronize the time between Router B

and Router A and ensure network security.

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

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

Router B as the client.

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

Figure 30 Network diagram

Configuration procedure

1. Set the IP address for each interface as shown in Figure 30. (Details not shown.)

2. Configure Router A:

# Specify the local clock as the reference source, with the stratum level 2.

<RouterA> system-view

[RouterA] ntp-service refclock-master 2

3. Configure Router B:

<RouterB> system-view

# Enable NTP authentication on Router B.

[RouterB] ntp-service authentication enable

# Set an authentication key.

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

# Specify the key as a trusted key.

[RouterB] ntp-service reliable authentication-keyid 42

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

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

Before Router B can synchronize to Router A, enable NTP authentication for Router A.