H3C S7500E Series Ethernet Switches Operation Manual

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Operation Manual – NTP

H3C S7500E Series Ethernet Switches Chapter 1 NTP Configuration

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II. Network diagram

Vlan-int3

1.0.1.11/24

Vlan-int3

1.0.1.10/24

Vlan-int2

3.0.1.31/24

Vlan-int2

3.0.1.32/24

Vlan-int2

3.0.1.30/24

Switch A Switch B

Switch C

Switch D

Figure 1-12 Network diagram for configuration of NTP broadcast mode with

authentication (on switches)

III. Configuration procedure

1) Configuration on Switch C:

# Specify the local clock as the reference source, with the stratum level of 3.

<SwitchC> system-view

[SwitchC] ntp-service refclock-master 3

# Configure NTP authentication

[SwitchC] ntp-service authentication enable

[SwitchC] ntp-service authentication-keyid 88 authentication-mode md5 123456

[SwitchC] ntp-service reliable authentication-keyid 88

# Specify Switch C as an NTP broadcast server, and specify an authentication key.

[SwitchC] interface vlan-interface 2

[SwitchC-Vlan-interface2] ntp-service broadcast-server authentication-keyid

2) Configuration on Switch D:

# Configure NTP authentication

<SwitchD> system-view

[SwitchD] ntp-service authentication enable

[SwitchD] ntp-service authentication-keyid 88 authentication-mode md5 123456

[SwitchD] ntp-service reliable authentication-keyid 88

# Configure Switch D to work in the NTP broadcast client mode

[SwitchD] interface vlan-interface 2

[SwitchD-Vlan-interface2] ntp-service broadcast-client