3Com MSR 50 Series Configuration Manual page 2068

2068 C 111: NTP C
HAPTER ONFIGURATION
Configuration procedure
1 Configuration on Router C:
# Specify the local clock as the reference source, with the stratum level of 2.
<RouterC> system-view
[RouterC] ntp-service refclock-master 2
# Configure Router C to work in the multicast server mode and send multicast
messages through Ethernet 1/0.
[RouterC] interface ethernet 1/0
[RouterC-Ethernet1/0] ntp-service multicast-server
2 Configuration on Router D:
# Configure Router D to work in the multicast client mode and receive multicast
messages on Ethernet 1/0.
<RouterD> system-view
[RouterD] interface Ethernet 1/0
[RouterD-Ethernet1/0] ntp-service multicast-client
Because Router D and Router C are on the same subnet, Router D can receive the
multicast messages from Router C without being IGMP-enabled and can be
synchronized to Router C.
# View the NTP status of Router D after clock synchronization.
[RouterD] display ntp-service status
Clock status: synchronized
Clock stratum: 3
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)
As shown above, Router D has been synchronized to Router C and the clock
stratum level of Router D is 3, while that of Router C is 2.
# View the NTP session information of Router D, which shows that an association
has been set up between Router D and Router C.
[RouterD] display ntp-service sessions
source reference
**************************************************************************
[1234] 3.0.1.31 127.127.1.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :
3 Configuration on Router B:
stra reach poll
2 254 64
1
now offset delay
62 -16.0 31.0 16.6
disper