3Com Switch 7750 Configuration Guide Guide

698 CHAPTER 66: NTP CONFIGURATION
Broadcast mode
Figure 178 NTP implementation mode: broadcast mode
Multicast mode
Figure 179 NTP implementation mode: multicast mode
Table 542 describes how the above mentioned NTP modes are implemented on
the Switch 7750 Family.
Tabl e 542 NTP implementation modes on the Switch 7750 Family
NTP implementation mode Configuration on Switch 7750 Family
Client/Server mode
Configure the Switch 7750 Family to operate
in the NTP server mode. In this case, the
remote server operates as the local time
server, and the Switch 7750 Family operates
as the client.
Peer mode
Configure the Switch 7750 Family to operate
in NTP peer mode. In this case, the remote
server operates as the peer of the Switch 7750
Family, and the Switch 7750 Family operates
as the active peer.
Netw ork
ClientServer
Broadcast clock synchronization
packets periodically
Client/Server mode request
Initiate a client/server mode
request after receiving the
first broadcast packet
Response packet
Obtain the delay betw een the
client and the server and work as
a client in broadcast mode
Broadcast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Receive broadcast packets and
synchronize its local clock
Netw ork
ClientServer
Broadcast clock synchronization
packets periodically
request after receiving the
first broadcast packet
Response packet
Obtain the delay betw een the
client and the server and work as
Broadcast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Receive broadcast packets and
synchronize its local clock
Netw ork
ClientServer
Broadcast clock synchronization
packets periodically
Client/Server mode request
Initiate a client/server mode
request after receiving the
first broadcast packet
Response packet
Obtain the delay betw een the
client and the server and work as
a client in broadcast mode
Broadcast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Receive broadcast packets and
synchronize its local clock
Netw ork
ClientServer
Broadcast clock synchronization
packets periodically
request after receiving the
first broadcast packet
Response packet
Obtain the delay betw een the
client and the server and work as
Broadcast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Receive broadcast packets and
synchronize its local clock
Netw ork
ClientServer
Multicast clock synchronization
packets periodically
Client/Server model request
Initiate a client/server mode
request after receiving the
f irst multicast packet
Response packet
Multicast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Obtain the delay betw een the
client and the server and work
as a client in multicast mode
Receive multicast packets and
synchronize its local clock
Netw ork
ClientServer
Multicast clock synchronization
packets periodically
Client/Server model request
request after receiving the
f irst multicast packet
Response packet
Multicast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Obtain the delay betw een the
client and the server and work
Receive multicast packets and
synchronize its local clock
Netw ork
ClientServer
Multicast clock synchronization
packets periodically
Client/Server model request
Initiate a client/server mode
request after receiving the
f irst multicast packet
Response packet
Multicast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Obtain the delay betw een the
client and the server and work
as a client in multicast mode
Receive multicast packets and
synchronize its local clock
Netw ork
ClientServer
Multicast clock synchronization
packets periodically
Client/Server model request
request after receiving the
f irst multicast packet
Response packet
Multicast clock synchronization
packets periodically
Work as a server
automatically and
send response
packets
Obtain the delay betw een the
client and the server and work
Receive multicast packets and
synchronize its local clock