H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 84)

6-16
<AC> display ntp-service status
Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
Nominal frequency: 64.0000 Hz
Actual frequency: 64.0000 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900 (00000000.00000000)
# Specify Switch as the NTP server of AC so that AC is synchronized to Switch.
<AC> system-view
[AC] ntp-service unicast-server 1.0.1.11
# View the NTP status of AC after clock synchronization.
[AC] display ntp-service status
Clock status: synchronized
Clock stratum: 3
Reference clock ID: 1.0.1.11
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: 1.05 ms
Peer dispersion: 7.81 ms
Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)
As shown above, AC has been synchronized to Switch, and the clock stratum level of AC is 3, while that
of Switch is 2.
# View the NTP session information of AC, which shows that an association has been set up between
AC and Switch.
[AC] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[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 the NTP Symmetric Mode
Network requirements
z The local clock of Switch is to be configured as a reference source, with the stratum level of 2.
z AC 1 works in the client mode and Switch is to be used as the NTP server of AC 1.
z AC 2 works in the symmetric-active mode and AC 1 will act as peer of AC 2. AC 2 is the
symmetric-active peer while AC 1 is the symmetric-passive peer.