NTP Configuration Examples 969
[SwitchB] display ntp-service sessions
source reference stra reach poll now offset delay disper
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[12345] 1.0.1.11 127.127.1.0 2 63 64 3 -75.5 31.0 16.5
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
Configuring NTP
Broadcast Mode with
Authentication
Network requirements
■ Switch C’s local clock is to be used as a reference source, with the stratum level
of 3.
■ Switch C works in the broadcast server mode and sends out broadcast
messages from VLAN-interface 2.
■ Switch D works in the broadcast client mode and receives broadcast messages
through VLAN-interface 2.
■ NTP authentication is enabled on both Switch C and Switch D.
Network diagram
Figure 288 Network diagram for configuration of NTP broadcast mode with
authentication
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 88
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
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