H3C Technologies H3C S6300 Series Switches - Manual (Page 59)

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<SwitchC> system-view
[SwitchC] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 3.
[SwitchC] ntp-service refclock-master 3
# Configure Switch C to operate in NTP broadcast server mode and use VLAN-interface 2 to send
NTP broadcast packets.
[SwitchC] interface vlan-interface 2
[SwitchC-Vlan-interface2] ntp-service broadcast-server
[SwitchC-Vlan-interface2] quit
5. Verify the configuration:
# NTP authentication is enabled on Switch A and Switch B, but not on Switch C, so Switch A and
Switch B cannot synchronize their local clocks to Switch C. Display the NTP service status on
Switch B.
[SwitchB-Vlan-interface2] display ntp-service status
Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
6. Enable NTP authentication on Switch C:
# Enable NTP authentication on Switch C. Configure an NTP authentication key, with the key ID of
88 and key value of 123456. Input the key in plain text, and specify it as a trusted key.
[SwitchC] ntp-service authentication enable
[SwitchC] ntp-service authentication-keyid 88 authentication-mode md5 simple 123456
[SwitchC] ntp-service reliable authentication-keyid 88
# Specify Switch C as an NTP broadcast server, and associate the key 88 with Switch C.
[SwitchC] interface vlan-interface 2
[SwitchC-Vlan-interface2] ntp-service broadcast-server authentication-keyid 88
7. Verify the configuration:
# After NTP authentication is enabled on Switch C, Switch A and Switch B can synchronize their
local clocks to Switch C. Display NTP service status on Switch B.
[SwitchB-Vlan-interface2] display ntp-service status
Clock status: synchronized
Clock stratum: 4
System peer: 3.0.1.31
Local mode: bclient
Reference clock ID: 3.0.1.31
Leap indicator: 00
Clock jitter: 0.006683 s
Stability: 0.000 pps
Clock precision: 2^-10
Root delay: 0.00127 ms
Root dispersion: 2.89877 ms
Reference time: d0d287a7.3119666f Sat, Jan 8 2011 6:50:15.191
The output shows that Switch B has been synchronized to Switch C, the clock stratum level of
Switch B is 4, and that of Switch C is 3.
# Display IPv4 NTP association information for Switch B.
[SwitchB-Vlan-interface2] display ntp-service sessions