3Com 7700 Configuration Manual page 328

48 C 11: S M
HAPTER YSTEM ANAGEMENT
[5]1.0.1.11
0.0 0.0
[5]128.108.22.44
0.0 0.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5
configured
Configure NTP multicast mode
SW77003 sets the local clock as the master clock at stratum 2 and multicast
packets from Vlan-interface2. Set SW77004 and SW77001 to receive multicast
messages from their respective Vlan-interface2. See Figure 1-2.
Configure Ethernet Switch SW77003:
1 Enter system view.
<SW77003> system-view
2 # Set the local clock as a master NTP clock at stratum 2.
[SW77003] ntp-service refclock-master 2
3 Enter Vlan-interface2 view.
[SW77003] interface vlan-interface 2
4 Set it as a multicast server.
[SW77003-Vlan-Interface2] ntp-service multicast-server
Configure Ethernet Switch SW77004:
1 Enter system view.
<SW77004> system-view
2 Enter Vlan-interface2 view.
[SW77004] interface vlan-interface 2
3 Enable multicast client mode.
[SW77004-Vlan-Interface2] ntp-service multicast-client
Configure Ethernet Switch SW77001:
1 Enter system view.
<SW77001> system-view
2 Enter Vlan-interface2 view.
[SW77001] interface vlan-interface 2
3 Enable multicast client mode.
[SW77001-Vlan-Interface2] ntp-service multicast-client
The above examples configure SW77004 and SW77001 to receive multicast
messages from Vlan-interface2, SW77003 multicast messages from
Vlan-interface2. Since SW77001 and SW77003 are not located on the same
segments, SW77001 cannot receive the multicast packets from SW77003, while
SW77004 is synchronized by SW77003 after receiving the multicast packet.
0.0.0.0 16
0.0.0.0 16
0 64 - 0.0
0 64 - 0.0