H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 86)

6-18
# View the NTP session information of AC 1, which shows that an association has been set up between
AC 1 and AC 2.
[AC1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[245] 3.0.1.31 127.127.1.0 2 15 64 24 10535.0 19.6 14.5
[1234] 3.0.1.33 LOCL 1 14 64 27 -77.0 16.0 14.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 2
Configuring NTP Broadcast Mode
Network requirements
z The local clock of AC 2 is to be used as a reference source, with the stratum level of 2.
z AC 2 works in the broadcast server mode and sends out broadcast messages from VLAN-interface
2.
z AC 1 and AC 3 work in the broadcast client mode. AC 1 listens to broadcast messages through its
VLAN-interface 3 and AC 3 from its VLAN-interface 2.
Figure 6-9 Network diagram for NTP broadcast mode configuration
Vlan-int3
1.0.1.11/24 Vlan-int3
1.0.1.10/24
Vlan-int2
3.0.1.31/24
Vlan-int2
3.0.1.32/24
Vlan-int2
3.0.1.30/24
AC 1 Switch
AC 2
AC 3
Configuration procedure
1) Configuration on AC 2:
# Specify the local clock as the reference source, with the stratum level of 2.
system-view
[AC2] ntp-service refclock-master 2
# Configure AC 2 to work in the broadcast server mode and send broadcast messages through
VLAN-interface 2.
[AC2] interface vlan-interface 2
[AC2-Vlan-interface2] ntp-service broadcast-server
2) Configuration on AC 3:
# Configure AC 3 to work in the broadcast client mode and receive broadcast messages on
VLAN-interface 2.
system-view
[AC3] interface vlan-interface 2