3Com SuperStack 4 Configuration Manual page 354

366 C 12: F S
HAPTER ILE
NTP peer Configuration
M
YSTEM ANAGEMENT
********************************************************************
[12345]1.0.1.11 LOCAL(0)
note: 1 source(master),2 source(peer),3 selected,4 candidate,5
configured
Network Requirements
On Switch 3, set local clock as the NTP master clock at stratum 2. On Switch 2,
configure SW5500G-EI 1 as the time server in server mode and set the local
equipment as in client mode. At the same time, Switch 5 sets Switch 4 as its peer.
Networking Diagram
See Figure 94.
Configuration Procedure
Configure Switch 3:
1 Enter System View.
<switch3> system-view
2 Set the local clock as the NTP master clock at stratum 2.
[switch3]ntp-service refclock-master 2
Configure Switch 4:
1 Enter System View.
<switch4> system-view
2 Set Switch 1 as the NTP server at stratum 3 after synchronization.
[switch4]ntp-service unicast-server 3.0.1.31
Configure Switch 5: (Switch 4 has been synchronized by Switch 3)
1 Enter System View.
<switch5> system-view
Set the local clock as the NTP master clock at stratum 1
[switch5] ntp-service unicast-peer 3.0.1.32
2 After performing local synchronization, set Switch 4 as a peer.
[switch5]ntp-service unicast-peer 3.0.1.32
The above examples configure Switch 4 and Switch 5 as peers and configures
Switch 5 in active peer mode and Switch 4 in passive peer mode. Since Switch 5 is
at stratum 1 and Switch 4 is at stratum 3, synchronize Switch 4 by Switch 5.
After synchronization, Switch 4 status is shown as follows:
[switch4]display ntp-service status
clock status: synchronized
clock stratum: 2
reference clock ID: 3.0.1.31
nominal frequency: 60.0002 Hz
actual frequency: 60.0002 Hz
clock precision: 2^17
clock offset: -9.8258 ms
root delay: 27.10 ms
root dispersion: 49.29 ms
peer dispersion: 10.92 ms
reference time: 19:21:32.287 UTC Oct 24 2004(C5267F3C.49A61E0C)
3 377 64 16 -0.4 0.0 0.9