3com S7906E Instruccion De Instalación

 

1-21 

 Actual frequency: 100.0000 Hz  

 Clock precision: 2^18 

 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, Switch D has been synchronized to Switch C, and the clock stratum level of Switch D 

is 3, while that of Switch C is 2.  

# View the NTP session information of Switch D, which shows that an association has been set up 

between Switch D and Switch C.  

[SwitchD-Vlan-interface2] display ntp-service sessions 

      source    reference    stra  reach  poll  now  offset   delay  disper 

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

[1234] 3.0.1.31  127.127.1.0   2   254     64    62   -16.0    32.0   16.6 

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

Total associations :  1 

z 

Switch C’s local clock is to be used as a reference source, with the stratum level of 2. 

z 

Switch C works in the multicast server mode and sends out multicast messages from 

VLAN-interface 2. 

z 

Switch A and Switch D work in the multicast client mode and receive multicast messages through 

VLAN-interface 3 and VLAN-interface 2 respectively. 

Figure 1-10 Network diagram for NTP multicast 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

Switch A

Switch B

Switch C

Switch D

 

 

1)  Configuration on Switch C: 

# Specify the local clock as the reference source, with the stratum level of 2.  

<SwitchC> system-view 

[SwitchC] ntp-service refclock-master 2