3Com WX3000 operation manual Server/client mode, Symmetric peer mode, Broadcast mode

Server/client mode

Figure 1-2Server/client mode
Client		Server
	Network
	Clock synchronization	Works in server mode
	request	automatically and sends
		a response packet
Filters and selects a clock	Response
and synchronizes the local
clock to that of the preferred
server

Symmetric peer mode

Figure 1-3Symmetric peer mode

Active peer Passive peer

Network

In peer mode, both sides can be synchronized to each other

Clock synchronization request

Response

Synchronize

Works in passive peer mode automatically

In the symmetric peer mode, the local device serves as the symmetric-active peer and sends clock synchronization request first, while the remote server serves as the symmetric-passive peer automatically.

If both of the peers have reference clocks, the one with a smaller stratum number is adopted.

Broadcast mode

Figure 1-4Broadcast mode

Server Client

Works in the server mode automatically and sends responses

Network

Broadcast clock synchronization packets periodically

Client/server mode

request

Response

Broadcast clock synchronization

packets periodically

Initiates a client/server mode request after receiving the first multicast packet

Obtains the delay between the client and server and works in the multicast client mode

Receives multicast packets and synchronizes the local clock

1-4