H3C Technologies H3C S3100 Series Switches - Manual (Page 481)

Operation Manual – NTP
H3C S3100-52P Ethernet Switch Chapter 1 NTP Configuration
1-19
Clock stratum: 3
Reference clock ID: 3.0.1.31
Nominal frequency: 250.0000 Hz
Actual frequency: 249.9992 Hz
Clock precision: 2^19
Clock offset: 198.7425 ms
Root delay: 27.47 ms
Root dispersion: 208.39 ms
Peer dispersion: 9.63 ms
Reference time: 17:03:32.022 UTC Thu Sep 6 2001 (BF422AE4.05AEA86C)
The output information indicates that S3100-52P-1 is synchronized to H3C3, with the
clock stratum level of 3, one level lower than that of H3C3.
# View the information about the NTP sessions of S3100-52P-1 and you can see that a
connection is established between S3100-52P-1 and H3C3.
[S3100-52P-1] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1]3.0.1.31 127.127.1.0 2 1 64 377 26.1 199.53 9.7
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
1.7.4 Configuring NTP Multicast Mode
I. Network requirements
The local clock of H3C3 is set to the NTP master clock, with a clock stratum level of 2.
H3C3 advertises multicast packets through Vlan-interface2.
S3100-52P-1 and S3100-52P-2 respectively listen to multicast packets through their
own Vlan-interface2.
Note:
This example assumes that H3C3 is a switch that supports the local clock being the
master clock.