Huawei Quidway S5600 Series - Ntp Implementation Mode

Operation Manual – NTP
Quidway S5600 Series Ethernet Switches-Release 1510 Chapter 1 NTP Configuration
Huawei Technologies Proprietary
1-4
1.1.3 NTP Implementation Mode
To accommodate networks of different structures and switches in different network
positions, NTP can operate in multiple modes, as described in the following.
I. Client/Server mode
Netw ork
Client Server
Clock synchronization
request packet
Response packetFilter and select clocks
and synchronize its
ow n clock to that of
the selected server
Work as a server
automatically and
send response
packets
Netw ork
Client Server
Response packetFilter and select clocks
and synchronize its
ow n clock to that of
the selected server
Work as a server
automatically and
send response
packets
Netw ork
Client Server
Clock synchronization
request packet
Response packetFilter and select clocks
and synchronize its
ow n clock to that of
the selected server
Work as a server
automatically and
send response
packets
Netw ork
Client Server
Response packetFilter and select clocks
and synchronize its
ow n clock to that of
the selected server
Work as a server
automatically and
send response
packets
Figure 1-2 NTP implementation mode: client/Sever mode
II. Peer mode
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
In peer mode, both
sides are synchronized
to the clock with
smaller stratum
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
Active peer Passive peer
Netw ork
Clock synchronization
request packet
Operates in the passive
peer mode automatically
Netw ork
Response packet
Synchronize
In peer mode, both
sides are synchronized
to the clock with
smaller stratum
Figure 1-3 NTP implementation mode: peer mode
In peer mode, the active peer sends clock synchronization packets first, and its peer
works as a passive peer automatically.
If both of the peers have reference clocks, the one with smaller stratum is adopted.