Huawei Quidway S3100 Series Operation Manual page 391

Operation Manual – NTP
Quidway S3100 Series Ethernet Switches
II. Peer mode
In peer mode, both In peer mode, both
sides are synchronized sides are synchronized
to the clock with to the clock with
smaller stratum 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.
III. Broadcast mode
Work as a server Work as a server Work as a server Work as a server
automatically and automatically and automatically and automatically and
send response send response send response send response
packets packets packets packets
Figure 1-4 NTP implementation mode: broadcast mod
IV. Multicast mode
Work as a server Work as a server Work as a server Work as a server
automatically and automatically and automatically and automatically and
send response send response send response send response
packets packets packets packets
Figure 1-5 NTP implementation mode: multicast mod
Table 1-1 describes how the above mentioned NTP modes are implemented on an
S3100 series switch.
Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer Active peer
Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork Netw ork
Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization Clock synchronization
request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet request packet
Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet Response packet
Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize Synchronize
Server Server Server Server
Netw ork Netw ork Netw ork Netw ork
Broadcast clock synchronization Broadcast clock synchronization Broadcast clock synchronization Broadcast clock synchronization
packets periodically packets periodically packets periodically packets periodically
Client/Server mode request Client/Server mode request
Response packet Response packet Response packet Response packet
Broadcast clock synchronization Broadcast clock synchronization Broadcast clock synchronization Broadcast clock synchronization
packets periodically packets periodically packets periodically packets periodically
Server Server Server Server
Netw ork Netw ork Netw ork Netw ork
Multicast clock synchronization Multicast clock synchronization Multicast clock synchronization Multicast clock synchronization
packets periodically packets periodically packets periodically packets periodically
Client/Server model request Client/Server model request Client/Server model request Client/Server model request
Response packet Response packet Response packet Response packet
Multicast clock synchronization Multicast clock synchronization Multicast clock synchronization Multicast clock synchronization
packets periodically packets periodically packets periodically packets periodically
Huawei Technologies Proprietary
Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passi Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer Passive peer ve peer
Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper Oper ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive ates in the passive
peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer peer mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically mode automatically
Client Client Client Client
Initiate a cli Initiate a cli ent/server mode ent/server mode
request after request after request after request after
first broadca first broadca first broadca first broadca st packet st packet st packet st packet
Obtain the del Obtain the del Obtain the del Obtain the del
client and t client and t client and t client and t he server and work as he server and work as he server and work as he server and work as
a client in br a client in br oadcast mode oadcast mode
Receive br Receive br Receive br Receive br oadcast packets and oadcast packets and oadcast packets and oadcast packets and
synchronize synchronize synchronize synchronize its local clock its local clock its local clock its local clock
e
Client Client Client Client
Initiate a c Initiate a c lient/server mode lient/server mode
request af request af request af request af ter receiving the ter receiving the ter receiving the ter receiving the
first multic first multic first multic first multic ast packet ast packet ast packet ast packet
Obtain the del Obtain the del Obtain the del Obtain the del
client and t client and t client and t client and t he server and work he server and work he server and work he server and work
as a client as a client in multicast mode in multicast mode
Receive m Receive m Receive m Receive m ulticast packets and ulticast packets and ulticast packets and ulticast packets and
synchroni synchroni synchroni synchroni ze its local clock ze its local clock ze its local clock ze its local clock
e
1-4
Chapter 1 NTP Configuration
receiving the receiving the receiving the receiving the
ay betw een the ay betw een the ay betw een the ay betw een the
ay betw een the ay betw een the ay betw een the ay betw een the