Ntp Implementation Modes - H3C S5100-SI Series Operation Manual

Operation Manual – NTP
H3C S5100-SI/EI Series Ethernet Switches

1.1.3 NTP Implementation Modes

According to the network structure and the position of the local Ethernet switch in the
network, the local Ethernet switch can work in multiple NTP modes to synchronize the
clock.
I. Server/client mode
Figure 1-2 Server/client mode
II. Symmetric peer mode
In peer mode, both sides
can be synchronized to
each other
Figure 1-3 Symmetric peer mode
In the symmetric peer mode, the local S5100-SI/EI Ethernet switch 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.
Active peer
Network
Clock synchronization
request packet
Response packet
Synchronize
Passive peer
Works in passive peer
mode automatically
1-4
Chapter 1 NTP Configuration