3Com 4500 PWR 26-Port Configuration Manual page 653

To do...
Enter VLAN interface view
Configure the switch to work in
the NTP broadcast server
mode
Configuring a switch to work in the NTP broadcast client mode
Follow these steps to configure a switch to work in the NTP broadcast client mode:
To do...
Enter system view
Enter VLAN interface view
Configure the switch to work in
the NTP broadcast client mode
Configuring NTP Multicast Mode
For switches working in the multicast mode, you need to configure both the server and clients. The
multicast server periodically sends NTP multicast messages to multicast clients. The switches working
in the NTP multicast client mode will respond to the NTP messages, so as to start the clock
synchronization.
A multicast server can synchronize multicast clients only after its clock has been synchronized.
An S4500 series switch working in the multicast server mode supports up to 1,024 multicast clients.
Configuring a switch to work in the multicast server mode
Follow these steps to configure a switch to work in the NTP multicast server mode:
To do...
Enter system view
Enter VLAN interface view
Configure the switch to work in
the NTP multicast server mode
Configuring a switch to work in the multicast client mode
Follow these steps to configure a switch to work in the NTP multicast client mode:
Use the command...
interface Vlan-interface
vlan-id
ntp-service broadcast-server
[ authentication-keyid key-id |
version number ]*
Use the command...
system-view
interface Vlan-interface
vlan-id
ntp-service broadcast-client
Use the command...
system-view
interface Vlan-interface vlan-id
ntp-service multicast-server
[ ip-address ] [ authentication-keyid
keyid | ttl ttl-number | version number ]*
54-9
Remarks
—
Required
Not configured by default.
Remarks
—
—
Required
Not configured by default.
Remarks
—
—
Required
Not configured by
default.