Configuring Ntp Multicast Mode; Configuring The Local Clock As A Reference Source - 3Com MSR 50 Series Configuration Manual

2058 C 111: NTP C
HAPTER
Configuring NTP
Multicast Mode
Configuring the Local
Clock as a Reference
Source
ONFIGURATION
The multicast server periodically sends NTP multicast messages to multicast clients,
which send replies after receiving the messages and synchronize their local clocks.
.For devices working in the multicast mode, you need to configure both the server
and clients. The NTP multicast mode must be configured in the specific interface
view.
Configuring a multicast client
Follow these steps to configure an NTP multicast client:
To do...
Enter system view
Enter interface view
Configure the device to work
in the NTP multicast client
mode
Configuring the multicast server
Follow these steps to configure the NTP multicast server:
To do...
Enter system view
Enter interface view
Configure the device to work
in the NTP multicast server
mode
n
A multicast server can synchronize broadcast clients only after its clock has
■
been synchronized.
You can configure up to 1024 multicast clients, among which 128 can take
■
effect at the same time.
A network device can get its clock synchronized in one of the following two ways:
Synchronized to the local clock, which as the reference source.
■
Synchronized to another device on the network in any of the four NTP
■
operation modes previously described.
If you configure two synchronization modes, the device will choose the optimal
clock as the reference source.
Follow these steps to configure the local clock as a reference source:
To do...
Enter system view
Use the command...
system-view
interface interface-type
interface-number
ntp-service multicast-client
[ ip-address ]
Use the command...
system-view
interface interface-type
interface-number
ntp-service
multicast-server
[ ip-address ]
[ authentication-keyid keyid
| ttl ttl-number | version
number ] *
Use the command...
system-view
Remarks
-
Enter the interface used to
receive NTP multicast
messages
Required
Remarks
-
Enter the interface used to
send NTP multicast message
Required
Remarks
-