3com 3031 Instruccion De Instalación

[Router3]ntp-service refclock-master 2

2 Configure Router4

a Enter the system view.

<Router4>system-view

b Set Router3 as the time server and the stratum number is 3 after 

synchronization. 

[Router4]ntp-service unicast-server 3.0.1.31

3 Configure Router5 (Router4 has been synchronized to Router3) 

a Enter the system view.

<Router5>system-view

b Set the local clock as the NTP master clock and stratum number is 1.  

[Router5]ntp-service refclock-master 1

c Set Router4 peer after the local is synchronized. 

[Router5]ntp-service unicast-peer 3.0.1.32

The above configurations make Router4 and Router5 as peers. Router5 is in active 
peer mode and Router4 is in passive peer mode. Because the stratum number of 
Router5 is 1 and that of Router4 is 3, Router4 is synchronized to Router5. 

The state of Router4 includes:

<Router4>display ntp-service status

clock status: synchronized, stratum: 2, reference clock ID: 3.0.1.33

nominal freq: 250.0000 Hz, actual freq: 249.9992 Hz, precision: 

2**19

offset: 198.7425 ms, reftime: 17:03:32.022 UTC Thu Sep 6 2001 

(BF422AE4.05AEA86C)

root delay : 27.47 ms, root disper: 208.39 ms, peer disper: 9.63 ms

Now Router4 is synchronized with Router5. Its stratum number is 2, which is 1 
number larger than that of Router5. 

The association state of Router4 displays that Router4 has established connection 
with Router5.

[Router4]display ntp-service sessions

       source          refid       st  now  poll reach  delay offset   

dis

********************************************************************

[12345]127.127.7.1  LOCAL(0)     3    1    64   377    26.1   199.53    

9.7

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 

configured

Router3 sets the local clock as the NTP master clock and the stratum number is 2. 
It transmits broadcast packets from Ethernet 1/0/0. Router4 and Router1 are set to 
listen to the broadcast message from their interfaces respectively.