3Com 4210 PWR - Page 376

374 CHAPTER 35: NTP CONFIGURATION
Configuring a switch to work in the NTP broadcast server mode
Configuring a 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 3Com Switch 4210 can work as a multicast server or a multicast client.
■ Refer to Table 287 for configuring a switch to work in the NTP multicast server
mode.
■ Refer to Table 288 for configuring a switch to work in the NTP multicast client
mode.
n
■ A multicast server can synchronize multicast clients only after its clock has been
synchronized.
■ The Switch 4210 working in the multicast server mode supports up to 1,024
multicast clients.
Configuring a switch to work in the multicast server mode
Tabl e 285 Configure a switch to work in the NTP broadcast server mode
Operation Command Description
Enter system view system-view -
Enter VLAN interface view interface Vlan-interface
vlan-id
-
Configure the switch to work
in the NTP broadcast server
mode
ntp-service
broadcast-server [
authentication-keyid key-id
| version number ]*
Required
Not configured by default.
Tabl e 286 Configure a switch to work in the NTP broadcast client mode
Operation Command Description
Enter system view system-view -
Enter VLAN interface view interface Vlan-interface
vlan-id
-
Configure the switch to work
in the NTP broadcast client
mode
ntp-service
broadcast-client
Required
Not configured by default.
Tabl e 287 Configure a switch to work in the NTP multicast server mode
Operation Command Description
Enter system view system-view -
Enter VLAN interface view interface Vlan-interface
vlan-id
-
Configure the switch to work
in the NTP multicast server
mode
ntp-service
multicast-server [ ip-address
] [ authentication-keyid
keyid | ttl ttl-number |
version number ]*
Required
Not configured by default.