Difference between the inband management and out-of-band management

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The differences of these two management modes lie in:
Reliability: In out-of-band mode, when the service link is faulty, you can still log in to and manage the storage device by using the management link.
Management mode: In out-of-band mode, either the ISM or CLI can be used for management. In inband mode, only the ISM can be used.
Networking: In inband mode, management data and service data share the same link. Therefore, the number of network cables is reduced.
Functions: In inband mode, the application server collaborates with the storage device. In some cases, the performance of the storage device is enhanced.

Other related questions:
In-band management and out-of-band management and differences between out-of-band management and in-band management
Differences between the in-band management and out-of-band management: FAQ-What is out-of-band management or inband management, and what are their differences

Out-of-band management concept
The management control data of a storage device is transferred on a different link from the service data. In a typical connection, the maintenance terminal connects to the management network port or serial port of the storage device to manage the device, and the application server connects to the service network port of the storage device to transmit service data. The two links are independent of each other. The management mode described in the Product Documentation and Configuration Guide is the out-of-band mode.

Inband management concept
The management control data of the storage device is transferred on the same link as the service data. In a typical connection, the application server connects to the storage device by using the service network port. Install the Inband Agent software (part of the HostAgent software package) on the application server to manage the storage device without interrupting service data transfer.

Server in-band management
The BMA or System Center plug-in implements in-band management of Huawei servers.

How to configure the route for the out-of-band network management on an S series switch
The management ports of S series switches are designed for management. When out-of-band network management is used, do not configure a default route to the gateway for out-of-band network management. In this way, the management ports will not receive user service data and save CPU resources. It is recommended that you configure a host route or a specific route when out-of-band network management is used.

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