3com 4500 PWR 50-PORT User Manual

C

HAPTER

 12: U

SING

 S

YSTEM

 M

ANAGEMENT

 C

OMMANDS

Configure the switch to receive NTP multicast messages through Vlan-interface1, 
with the multicast IP address being 224.0.1.1.

<SW4500> system-view

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

[SW4500] interface Vlan-interface 1

[SW4500-Vlan-interface1] ntp-service multicast-client 224.0.1.1

ip-address ] [ authentication-keyid 

key-id | ttl ttl-number | version number ]*

ip-address ]

VLAN interface view

: Multicast IP address, in the range of 224.0.1.0 to 224.0.1.255. The 

default IP address is 224.0.1.1.

: Specifies the key ID used for sending messages 

to multicast clients. The key-id argument ranges from 1 to 4294967295.

: Defines the lifetime of multicast messages. The ttl-number 

argument ranges from 1 to 255 and defaults to 16.

: Specifies the NTP version number which ranges from 1 to 3 and 

defaults to 3.

Use the 

command to configure an Ethernet 

switch to operate in the NTP multicast server mode and send NTP multicast 
messages through the current interface.

Use the u

command to remove the 

configuration.

By default, no Ethernet switch operates in multicast server mode.

Configure the switch to send NTP multicast messages through Vlan-interface1, 
and set the multicast group address to 224.0.1.1, keyid to 4, and the NTP version 
number to 3.

<SW4500> system-view

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

[SW4500] interface Vlan-interface 1

[SW4500-Vlan-interface1]ntp-service multicast-server 224.0.1.1