Contents

Configuring cloud connections· 1

About cloud connections· 1

Multiple subconnections· 1

Cloud connection establishment 1

Configuring the cloud server 2

Configuring the local device· 2

Unbinding the device from the cloud server 4

Display and maintenance commands for cloud connections· 5

Cloud connection configuration examples· 5

Example: Configuring a cloud connection· 5

Cloud connection configuration examples· 6

Example: Configuring a cloud connection· 6

 

Configuring cloud connections

About cloud connections

A cloud connection is a management tunnel established between a local device and the cloud server. It enables you to manage the local device from the cloud server without accessing the network where the device resides.

Multiple subconnections

After a local device establishes a connection with the cloud server, service modules on the local device can establish multiple subconnections with the microservices on the cloud 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 cloud server is established as follows:

1.     The device sends an authentication request to the cloud server.

2.     The cloud 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 cloud server. If the authentication fails, the cloud server sends an authentication failure packet to the device.

3.     The device sends a registration request to the cloud server.

4.     The cloud 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 cloud server.

6.     The cloud 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 cloud server based on the service needs.

 

Figure 1 Establishing a cloud connection

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Configuring the cloud server

For a successful cloud connection establishment, add the serial number of the device to be managed to the cloud server. For more information about the cloud server settings, see the installation guide for the cloud server.

Configuring the local device

About this task

You can specify a cloud server by its domain name and log in to the server through the domain name on a remote PC to manage the local device.

For a device to establish a cloud connection to the cloud server, perform either of the following tasks:

·     Manual configuration: Use cloud-management server domain or cloud-management backup-server domain to specify the domain name of the cloud server on the device through CLI.

·     Auto obtaining: Configure VLAN interface 1 of the device as a DHCP client and the cloud server as the DHCP server. The device obtains the IP address of the DHCP server and parses the option 253 field in the DHCP packets to obtain the domain name of the cloud server. When the domain name obtained through the option 253 field is an IPv4 or IPv6 address, the device uses the IPv4 or IPv6 address to connect to the cloud server. When the domain name obtained through the option 253 field is not an IPv4 or IPv6 address, the device parses the domain name into an IPv4 address. If the device fails to parse the domain name into an IPv4 address, it will not parse the domain name into an IPv6 address. For more information about the option 253 field, see DHCP configuration in Layer 3—IP Services Configuration Guide.

To establish cloud connections to the cloud server, a password is required. A device can use either of the following methods to obtain the password for establishing cloud connections to the cloud server:

·     Execute the cloud-management server password command on the device to specify the password for establishing cloud connections to the cloud server.

·     Configure VLAN interface 1 of the device as a DHCP client and the cloud server as the DHCP server. The device obtains the IP address of the DHCP server and parses the option 252 field in the DHCP packets to obtain the password for connection to the cloud server. For more information about the option 252 field, see DHCP configuration in Layer 3—IP Services Configuration Guide.

After establishing the cloud connection, the local device sends keepalive packets to the cloud server at the interval specified by the cloud-management keepalive interval command. If the device does not receive a response from the cloud server after the number of keepalive packets sent reached the limit specified by the cloud-management keepalive count count command, the device sends a registration request to re-establish the cloud connection.

To prevent NAT entry aging, the local device sends ping packets to the cloud server periodically.

If the cloud server verifies the token of a device before establishing a cloud connection to the device, you must configure the token on the device. To avoid authentication failure, make sure the token configured on the device is consistent with that specified for the device on the cloud server.

Restrictions and guidelines

You can specify one primary server by using the cloud-management server domain command and a maximum of eight IPv4 and IPv6 backup servers by repeating the cloud-management backup-server domain command. Each server domain name supports a maximum of three port numbers.

When establishing a cloud connection, the device can connect to only one cloud server at one time according to the sequence in which the servers are stored. The server domain names are stored in alphabet order and port numbers are in descending order. To view the connected server, execute the display cloud-management state command.

If multiple servers exist in the intranet and the NAT device has only one public IP address, you can execute this command to specify different port numbers for one server domain name.

When establishing a cloud connection, the first specified server has the highest priority. When the connected server fails, the device switches to another server and does not switch back to the original server even if the original server recovers.

The password obtained through DHCP has a higher priority than the password configured manually.

If a device obtains the password for connection to the cloud server through DHCP after establishing a cloud connection to the cloud server with the manually configured password, the device performs the following tasks:

·     If the automatically obtained and manually configured passwords are identical, the device retains the cloud connection.

·     If the automatically obtained and manually configured passwords are different, the device tears down the cloud connection and then establishes a cloud connection to the cloud server with the automatically obtained password.

Reduce the ping interval value if the network condition is poor or the NAT entry aging time is short. When you use the cloud server for cloud connections, you must set the password for establishing cloud connections to the cloud server.

Prerequisites

Before configuring this feature, make sure a DNS server is configured to translate domain names.

To obtain the password for connection to the cloud server automatically, first configure the option 252 field as the password of the cloud server.

Procedure

1.     Enter system view.

system-view

2.     Enable cloud connection.

cloud-management server connect enable

By default, cloud connection is enabled for a device.

3.     Specify the primary cloud server by its domain name.

cloud-management server [ ipv6 ] domain domain-name [ port port-number ] [ vpn-instance vpn-instance-name ] [ source-ip ip-address ]

By default, the cloud server uses domain name ops.seccloud.h3c.com.

4.     (Optional.) Specify a backup cloud server by its domain name.

cloud-management backup-server [ ipv6 ] domain domain-name [ port port-number ] [ vpn-instance vpn-instance-name ] [ source-ip ip-address ]

By default, no backup cloud server is specified.

5.     (Optional.) Set the keepalive interval.

cloud-management keepalive interval

By default, the keepalive interval is 180 seconds.

6.     (Optional.) Specify the maximum number of consecutive keepalive packets that the local device can send to the cloud server.

cloud-management keepalive count count

By default, the local device can send three consecutive keepalive packets to the cloud server.

7.     (Optional.) Set the ping interval.

cloud-management ping interval

By default, the ping interval is 60 seconds.

8.     (Optional.) Specify the TCP port number used by the device to initiate the authentication to the cloud server.

cloud-management server port port-number

By default, TCP port number 19443 is used by the device to initiate the authentication to a cloud server.

9.     (Optional.) Set the password for establishing cloud connections to the cloud server.

cloud-management server password { cipher | simple } string

By default, no password is set for establishing cloud connections to the cloud server.

10.     (Optional.) Set the token for establishing cloud connections to the cloud server.

cloud-management token { cipher | simple } string

By default, no token is set for establishing cloud connections to the cloud server.

Unbinding the device from the cloud server

About this task

A device can be registered on the cloud server by only one user.

To register a device that has been registered by another user, you need to take the following steps:

1.     Obtain a verification code for device unbinding from the cloud server.

2.     Execute the command on the device for sending the verification code to the cloud server.

3.     Register the device on the cloud server.

Procedure

1.     Enter system view.

system-view

2.     Send the verification code for device unbinding to the cloud server.

cloud-management unbinding-code code

Display and maintenance commands for cloud connections

Execute display commands in any view.

 

Task	Command
Display cloud connection state information.	display cloud-management state

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Cloud connection configuration examples

Example: Configuring a cloud connection

Network configuration

As shown in Figure 2, configure the AC to establish a cloud connection with the cloud server.

Figure 2 Network diagram

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Procedure

1.     Configure IP addresses for interfaces as shown in Figure 2, and configure a routing protocol to make sure the devices can reach each other. (Details not shown.)

2.     Log in to the cloud server to add the serial number of the AC to the server. (Details not shown.)

3.     Configure the domain name of the cloud server as oasiscloud.h3c.com.

<AC> system-view

[AC] cloud-management server domain oasiscloud.h3c.com

 

	NOTE: ·     The DNS service is provided by the ISP DNS server. ·     The domain name and IP address of the cloud server used here are for illustration only.

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Verifying the configuration

# Verify that the AC and the cloud server have established a cloud connection.

[AC] display cloud-management state

Cloud connection state                      : Established

Device state                                : Request_success

Cloud server address                        : 52.163.242.100

Cloud server domain name                    : oasiscloud.h3c.com

Cloud connection mode                       : Https

Cloud server authentication port            : 19443

Cloud server connection port                : 443

Connected at                                : Wed Jan 27 14:18:40 2018

Duration                                    : 00d 00h 02m 01s

Process state                               : Message received

Failure reason                              : N/A

Last down reason                            : socket connection error (Details:N/A)

Last down at                                : Wed Jan 27 13:18:40 2018

Last report failure reason                  : N/A

Last report failure at                      : N/A

Dropped packets after reaching buffer limit : 0

Total dropped packets                       : 1

Last report incomplete reason               : N/A

Last report incomplete at                   : N/A

Buffer full count                           : 0

Cloud connection configuration examples

Example: Configuring a cloud connection

Network configuration

As shown in Figure 3, configure the AP to establish a cloud connection with the cloud server.

Figure 3 Network diagram

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Procedure

1.     Configure IP addresses for interfaces as shown in Figure 3, and configure a routing protocol to ensure that the devices can reach each other. (Details not shown.)

2.     Log in to the cloud server to add the serial number of the AP to the server. (Details not shown.)

3.     Configure the domain name of the cloud server as oasiscloud.h3c.com.

<AP> system-view

[AP] cloud-management server domain oasiscloud.h3c.com

 

	NOTE: ·     The DNS service is provided by the ISP DNS server. ·     The domain name and IP address of the cloud server used here are for illustration only.

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Verifying the configuration

# Verify that the AP and the cloud server have established a cloud connection.

[AP] display cloud-management state

Cloud connection state                      : Established

Device state                                : Request_success

Cloud server address                        : 52.163.242.100

Cloud server domain name                    : oasiscloud.h3c.com

Cloud connection mode                       : Https

Cloud server authentication port            : 19443

Cloud server connection port                : 443

Connected at                                : Wed Jan 27 14:18:40 2018

Duration                                    : 00d 00h 02m 01s

Process state                               : Message received

Failure reason                              : N/A

Last down reason                            : socket connection error (Details:N/A)

Last down at                                : Wed Jan 27 13:18:40 2018

Last report failure reason                  : N/A

Last report failure at                      : N/A

Dropped packets after reaching buffer limit : 0

Total dropped packets                       : 1

Last report incomplete reason               : N/A

Last report incomplete at                   : N/A

Buffer full count                           : 0