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Configuring cloud connections 
About cloud connections 
A cloud connection is a management tunnel established between a local device and the H3C Oasis 
server. It enables you to manage the local device from the H3C Oasis server without accessing the 
network where the device resides. 
Multiple subconnections 
After a local device establishes a connection with the H3C Oasis server, service modules on the 
local device can establish multiple subconnections with the microservices on the H3C Oasis server. 
These  subconnections are independent from each other and provide  separate communication 
channels for different services. This mechanism avoids interference among different services. 
Cloud connection establishment 
As shown in Figure 1, the cloud connection between the device and the H3C Oasis server is 
established as follows: 
1.  The device sends an authentication request to the H3C Oasis server. 
2.  The H3C Oasis server sends an authentication success packet to the device. 
The device passes the authentication only if the serial number of the device has been added to 
the H3C Oasis server. If the authentication fails, the H3C Oasis server sends an authentication 
failure packet to the device. 
3.  The device sends a registration request to the H3C Oasis server. 
4.  The H3C Oasis server sends a registration response to the device. 
The registration response contains the uniform resource locator (URL) used to establish a 
cloud connection. 
5.  The device uses the URL to send a handshake request (changing the protocol from HTTP to 
WebSocket) to the H3C Oasis server. 
6.  The H3C Oasis server sends a handshake response to the device to finish establishing the 
cloud connection. 
7.  After the cloud connection is established, the device automatically obtains the subconnection 
URLs and establishes subconnections with the H3C Oasis server based on the service needs.