3com 4500 PWR 50-PORT User Manual

By default, the local Ethernet switch is not configured as an active NTP peer.

If you use remote-ip to specify a remote server as the peer of the local Ethernet 
switch, the local switch operates in the active peer mode. In this case, the local 
Ethernet switch and the remote server can be synchronized to each other.

Configure the local peer to obtain time information from the peer with the IP 
address 128.108.22.44 and also to provide time information to the remote peer. 
Set the NTP version number to 3. The source IP address of NTP messages is the IP 
address of Vlan- interface1.

<SW4500> system-view

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

[SW4500] ntp-service unicast-peer 128.108.22.44 version 3 

remote-ip | server-name } [ 

vlan-id | version number ]*

remote-ip | server-name }

System view

: IP address of an NTP server. This argument cannot be a broadcast 

address, multicast group address, or IP address of a reference clock.

 NTP server name, a string comprising 1 to 20 characters.

key-id:

 Specifies the key ID used for sending messages 

to the NTP server. The key-id argument ranges from 1 to 4294967295. You do not 
need to configure authentication-keyid key-id if authentication is not required.

: Specifies the server identified by the remote-ip or the server-name 

argument as the preferred server. 

vlan-id

: Specifies an interface whose IP 

address serves as the source IP address of NTP packets sent by the local device to 
the server.

: Specifies the NTP version number. The number argument ranges 

from 1 to 3 and defaults to 3.

Use the 

command to configure an Ethernet 

switch to operate in the NTP client mode.