3Com 10014298 manual Example Configuring NTP Multicast Mode, Set it as a multicast server

NTP 291

clock offset: 0.0000 ms

root delay: 0.00 ms

root dispersion: 10.94 ms

peer dispersion: 10.00 ms

reference time: 20:54:25.156 UTC Mar 7 2002(C0325201.2811A112)

By this time, SW77504 has been synchronized by SW77503 and it is at stratum 3, higher than SW77503 by 1.

Display the status of SW77504 sessions and you will see SW77504 has been connected to SW77503:

[SW77502]display ntp-service sessions

source	reference	stra reach poll now offset delay
disper

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

****** [12345]127.127.1.0 LOCAL(0)7 377 64 57

0.0 0.0 1.0

	[5]1.0.1.11	0.0.0.0	16	0	64	-	0.0
0.0	0.0
	[5]128.108.22.44	0.0.0.0	16	0	64	-	0.0
0.0	0.0

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

Example: Configuring NTP Multicast Mode

SW77503 sets the local clock as the master clock at stratum 2, and multicast packets from Vlan-interface2. Set SW77504 and SW77501 to receive multicast messages from their respective Vlan-interface2. See Figure 66.

Configure Ethernet Switch SW77503:

1Enter system view.

<SW77503>system-view

2# Set the local clock as a master NTP clock at stratum 2.

[SW77503]ntp-service refclock-master 2

3Enter Vlan-interface2 view.

[SW77503]interface vlan-interface 2

4Set it as a multicast server.

[SW77503-Vlan-Interface2]ntp-service multicast-server

Configure Ethernet Switch SW77504:

1Enter system view.

<SW77504>system-view

2Enter Vlan-interface2 view.

[SW77504]interface vlan-interface 2