3Com Switch 4800G 24-Port - Configuring Optional Parameters of NTP

956 CHAPTER 77: NTP CONFIGURATION
Configuring the multicast server
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■ 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.
Configuring Optional
Parameters of NTP
Configuring the
Interface to Send NTP
Messages
After you specify the interface used to send NTP messages, the source IP address
of the NTP message will be configured as the primary IP address of the specified
interface.
Following these steps to configure the interface used to send NTP messages:
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CAUTION: If you have specified an interface in the ntp-service unicast-server or
ntp-service unicast-peer command, this interface will be used for sending NTP
messages.
Disabling an Interface
from Receiving NTP
Messages
Enter interface view interface interface-type
interface-number
Enter the interface used to
receive NTP multicast
messages
Configure the switch to work
in the NTP multicast client
mode
ntp-service multicast-client
[ ip-address ]
Required
To do… Use the command… Remarks
Enter system view system-view -
Enter interface view interface interface-type
interface-number
Enter the interface used to
send NTP multicast
message
Configure the switch to
work in the NTP
multicast server mode
ntp-service multicast-server
[ ip-address ] [ authentication-keyid
keyid | ttl ttl-number | version
number ] *
Required
To do… Use the command… Remarks
To do… Use the command… Remarks
Enter system view system-view -
Configure the interface used to
send NTP messages
ntp-service source-interface
interface-type interface-number
Required
To do… Use the command… Remarks
Enter system view system-view -
Enter interface view interface interface-type
interface-number
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