3com 8807 참조 가이드

VLAN interface view

ip-address: Multicast IP address of Class D. It defaults to 224.0.1.1. Actually, for 
the Switch 8800 Family series, you can set 224.0.1.1 as the multicast IP address 
only.

authentication-keyid: Specifies authentication key.

keyid: Key ID used in multicast, ranging from 1 to 4294967295.

ttl: Time to live of a multicast packet.

ttl-number: ttl of a multicast packet, ranging from 1 to 255.

version: Specifies the NTP version number.

number: NTP version number and range from 1 to 3.

Use the ntp-service multicast-server command to configure NTP multicast 
server mode, if no IP address is specified, switch automatically choice the 
224.0.1.1 as the multicast IP address.

Use the undo ntp-service multicast-server command to disable NTP multicast 
server mode, if no IP address is specified, the switch will disable the configuration 
of the multicast IP address 224.0.1.1.

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.

# Configure to transmit NTP multicast packets encrypted with Key 4 through 
Vlan-Interface1 at 224.0.1.1 and use NTP version 3.

<SW8800> system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] interface vlan-interface 1

 

[3Com-Vlan-interface1] ntp-service multicast-server 224.0.1.1 

 

authentication-keyid 4 version 3 

ntp-service refclock-master [ ip-address ] [ stratum ]

undo ntp-service refclock-master [ ip-address ]

System view