H3C Technologies H3C S3600 Series Switches - Manual (Page 872)

1-5
Multicast mode
Figure 1-5 Multicast mode
Client
Multicast clock synchronization
packets periodically
Network
Server
Initiates a client/server mode
request
after receiving the
first multicast packet
Works in the server mode
automatically and sends
response packets
Client/server mode
reques
Response packet
Obtains the delay between the
client and server and works in
the multicast client mode
Receives multicast packets and
synchronizes the local clock
Multicast clock synchronization
packets periodically
Table 1-1 describes how the above mentioned NTP modes are implemented on H3C S3600 series
Ethernet switches.
Table 1-1 NTP implementation modes on H3C S3600 series Ethernet switches
NTP implementation mode Configuration on S3600 series switches
Server/client mode
Configure the local S3600 Ethernet switch to work in the
NTP client mode. In this mode, the remote server serves
as the local time server, while the local switch serves as
the client.
Symmetric peer mode
Configure the local S3600 switch to work in NTP
symmetric peer mode. In this mode, the remote server
serves as the symmetric-passive peer of the S3600
switch, and the local switch serves as the
symmetric-active peer.
Broadcast mode
z Configure the local S3600 Ethernet switch to work in
NTP broadcast server mode. In this mode, the local
switch broadcasts NTP messages through the VLAN
interface configured on the switch.
z Configure the S3600 switch to work in NTP broadcast
client mode. In this mode, the local S3600 switch
receives broadcast NTP messages through the VLAN
interface configured on the switch.
Multicast mode
z Configure the local S3600 Ethernet switch to work in
NTP multicast server mode. In this mode, the local
switch sends multicast NTP messages through the
VLAN interface configured on the switch.
z Configure the local S3600 Ethernet switch to work in
NTP multicast client mode. In this mode, the local
switch receives multicast NTP messages through the
VLAN interface configured on the switch.