Switch 7700 Command reference Guide, v2.0

NTP Configuration Commands 499
View
VLAN interface view
Parameter
ip-address: Specify a multicast IP address of Class D and default to 224.0.1.1.
authentication-keyid: Specify authentication key.
keyid: Key ID used in multicast, ranging from 0 to 4294967295.
ttl: Define the time to live of a multicast packet.
ttl-number: Specify the ttl of a multicast packet and range from 1 to 255.
version: Define NTP version number.
number: Specify NTP version number and range from 1 to 3.
Description
Using ntp-service multicast-server command, you can configure NTP
multicast server mode. Using
undo ntp-service multicast-server command,
you can disable NTP multicast server mode.
By default, the multicast service is disabled. IP address defaults to 224.0.1.1 and
the version number defaults to 3.
Designate an interface on the local equipment to transmit NTP multicast packet.
The local equipment operates in multicast-server mode and multicasts packets
regularly to its clients.
Example
Configure to transmit NTP multicast packets encrypted with Key 4 via
Vlan-Interface1 at 224.0.1.1 and use NTP version 3.
[SW7700]interface vlan-interface 1
[SW7700-Vlan-Interface1]ntp-service multicast-server 224.0.1.1
authentication-keyid 4 version 3
ntp-service
refclock-master
Syntax
ntp-service refclock-master [ ip-address ] [ stratum ]
undo ntp-service refclock-master [ ip-address ]
View
System view
Parameter
ip-address: Specify the reference clock IP address as 127.127.t.u. Here, t ranges
from 0 to 37 and u ranges from 0 to 3.
stratum: Specify which stratum the local clock is located at and range from 1 to
15.
Description
Using ntp-service refclock-master command, you can configure an external
reference clock or the local clock as an NTP master clock. Using
undo