H3C Technologies H3C MSR 50 - Manual (Page 64)

# Enable NTP authentication on Router B. Configure an NTP authentication key, with the key ID of
88 and key value of 123456. Specify the key as a trusted key.
<RouterB> system-view
[RouterB] ntp-service authentication enable
[RouterB] ntp-service authentication-keyid 88 authentication-mode md5 123456
[RouterB] ntp-service reliable authentication-keyid 88
# Configure Router B to operate in broadcast client mode and receive NTP broadcast messages on
Ethernet 1/1.
[RouterB] interface ethernet 1/1
[RouterB-Ethernet1/1] ntp-service broadcast-client
4. Configure Router C:
# Specify the local clock as the reference source, with the stratum level 3.
<RouterC> system-view
[RouterC] ntp-service refclock-master 3
# Configure Router C to operate in NTP broadcast server mode and use Ethernet 1/1 to send NTP
broadcast packets.
[RouterC] interface ethernet 1/1
[RouterC-Ethernet1/1] ntp-service broadcast-server
[RouterC-Ethernet1/1] quit
# Router A synchronizes its local clock based on the received broadcast messages sent from Router
C.
# Display NTP service status information on Router A.
[RouterA-Ethernet1/1] display ntp-service status
Clock status: synchronized
Clock stratum: 4
Reference clock ID: 3.0.1.31
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 8.31 ms
Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Router A has synchronized to Router C. The stratum level of Router A is 4,
and that of Router C is 3.
# Display NTP session information for Router A, which shows that an association has been set up
between Router A and Router C.
[RouterA-Ethernet1/1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1234] 3.0.1.31 127.127.1.0 3 254 64 62 -16.0 32.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
# NTP authentication is enabled on Router B, but not enabled on Router C, so Router B cannot
synchronize to Router C.
[RouterB-Ethernet1/1] display ntp-service status
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