Configuring The Ntp Symmetric Mode - 3Com MSR 50 Series Configuration Manual

2064 C 111: NTP C
HAPTER
Configuring the NTP
Symmetric Mode
ONFIGURATION
As shown above, Device B has been synchronized to Device A, and the clock
stratum level of Device B is 3, while that of Device A is 2.
# View the NTP session information of Device B, which shows that an association
has been set up between Device B and Device A.
[DeviceB] display ntp-service sessions
source reference
**************************************************************************
[12345] 1.0.1.11
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :
Network requirements
The local clock of Device A is to be configured as a reference source, with the
■
stratum level of 2.
Device B works in the client mode and Device A is to be used as the NTP server
■
of Device B, with Device B as the client.
Device C works in the symmetric-active mode and Device B will act as peer of
■
Device C. Device C is the symmetric-active peer, while Device B is the
symmetric-passive peer.
Network diagram
Figure 617 Network diagram for NTP symmetric peers mode configuration
3.0.1.32/24
Device B
Configuration procedure
1 Configuration on Device A:
# Specify the local clock as the reference source, with the stratum level of 2.
<DeviceA> system-view
[DeviceA] ntp-service refclock-master 2
2 Configuration on Device B:
# Specify Device A as the NTP server of Device B.
<DeviceB> system-view
[DeviceB] ntp-service unicast-server 3.0.1.31
3 Configuration on Device C (after Device B is synchronized to Device A):
stra reach poll
127.127.1.0 2 63
1
Device A
3.0 .1.31/24
3 .0.1.33/24
Device C
now offset delay disper
64 3 -75.5 31.0 16.5