3Com 3031 Command Reference Manual page 111

debugging ntp-service 111
ttl-number: Life span of the multicast packet in the range of 1 to 255.
version: Defines the NTP version number.
number: NTP version number in the range of 1 to 3.
Description
Using the ntp-service multicast-server command, you can configure the NTP
multicast server mode. Using the undo ntp-service multicast-server command, you
can remove the NTP multicast server mode.
By default, no multicast service is configured, the IP address is 224.0.1.1 and the
version number is 3.
This command is used to specify an interface on the local device to transmit NTP
multicast packets. The local device is run in server (multicast-server) mode, which
acts as the multicast server to transmit multicast messages periodically to the
multicast clients.
Example
Configure Ethernet 1/0/0 to transmit NTP multicast messages. The multicast
address is 244.0.1.1, encrypted by No.4 key. The NTP version number is set to 3.
[3Com] interface ethernet 1/0/0
[3Com-Ethernet1/0/0] ntp-service multicast-server 224.0.1.1
authentication-keyid 4 version 3
ntp-service Syntax
refclock-master
ntp-service refclock-master [ X.X.X.X ] [ layers-number ]
undo ntp-service refclock-master [ X.X.X.X ]
View
System view
Parameter
X.X.X.X: IP address of the reference clock 127.127.t.u.
layers-number: Specifies the stratum of the local clock, which is in the range of 1
to 15.
Description
Using the ntp-service refclock-master command, you can set the external
reference clock or the local clock to be the NTP master clock. Using the undo
ntp-service refclock-master command, you can remove the setting of the NTP
master clock.
By default, the X.X.X.X is not specified and the stratum is 1.