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NE20E-S V800R010C10SPC500 Feature Description - Interface and Data Link 01

This is NE20E-S V800R010C10SPC500 Feature Description - Interface and Data Link
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
AP PnP

AP PnP

In AP plug-and-play (PnP) mode, a master automatically detects and manages APs when APs go online, go offline, migrate, or restart or when the master restarts. The port extension system supports AP PnP, which simplifies network O&M and management. AP PnP involves the following processes:

An AP Goes Online for the First Time

Figure 3-6 shows the PnP process after an AP goes online for the first time.

Figure 3-6 PnP process after an AP goes online for the first time

Table 3-1 describes the PnP process.

Table 3-1 PnP process

Step

Description

1

A network administrator performs basic configurations required for AP PnP on an NMS, including:

  • AP's ESN

  • AP's management IP address

  • Login password and SFTP access directory for a user created on the AP

2

The AP starts with the default configuration, automatically enables the data communication network (DCN) function, and uses OSPF to advertise its ESN and initial PnP status in the port extension system.

3

Master uses the DCN function to detect the AP and identifies the initial PnP status. Master reports the detected AP's information (such as the ESN) to the NMS.

4

The NMS sends the basic configurations required for AP PnP (see Step 1) to Master.

5

Master checks whether the AP's ESN has been locally configured. If the AP's ESN has been locally configured, Master starts the PnP process. Otherwise, Master stops the PnP process.

NOTE:

To enable a master to manage an AP, configure the AP's ESN on the master.

6

Master uses the initial user name and password to establish STelnet connections to the AP and issue a PnP start command to the AP.

7

The AP starts the PnP process and timer to wait for PnP process completion.

8

Master delivers the following basic configurations (including configurations that Master automatically generates and basic configurations that the NMS delivers) to the AP:

  • Virtual access capability enabling

  • AP role setting

  • AP's management IP address

  • Login password and SFTP access directory for a user created on the AP

If the preceding basic configurations are complete, the master delivers a PnP stop command. Otherwise, the master stops the PnP process.

9

The AP automatically performs the basic configurations.

If the AP receives a PnP stop command, it considers the basic configurations completed and stops the timer. If the AP does not receive a PnP stop command before the timer expires, it considers the basic configurations incomplete and automatically restarts itself to begin the PnP process again.

10

The AP uses OSPF to advertise the PnP stop status in the port extension system.

11

Master detects the AP's PnP stop status and report it to the NMS. The PnP process ends, and the AP goes online successfully.

NOTE:

The preceding AP PnP process involves an NMS. If your scenario does not involve an NMS, you must perform basic configurations required for AP PnP on a master in advance. This operation also applies to the following PnP processes.

An AP Restarts and Goes Online

Figure 3-7 shows the PnP process after an AP restarts and goes online.

Figure 3-7 PnP process after an AP restarts and goes online

Table 3-2 describes the PnP process.

Table 3-2 PnP process

Step

Description

1

After the AP restarts, it reads the locally stored PnP status and uses OSPF to advertise its own PnP status in the port extension system.

2

The master uses the DCN function to detect the AP and identify the AP's PnP status.

NOTE:

If the AP restarts for configuration recovery, its PnP status is complete. If the AP restarts for configuration clearing, its PnP status is initial.

3

The master notifies the NMS that the AP has completed the PnP process.

4

The AP establishes NETCONF and control channels to the master.

5

The master uses the NETCONF channel to reconcile configurations with the AP so that services are restored.

NOTE:

Configuration reconciliation means that the master checks whether configurations for the AP on it are the same as those on the AP. If any configurations are missing, the master uses the NETCONF channel to deliver the missing configurations to the AP.

The Master Restarts

Figure 3-8 shows the AP PnP process after the master restarts.

Figure 3-8 AP PnP process after the master restarts

Table 3-3 describes the PnP process.

Table 3-3 PnP process

Step

Description

1

After the restart is complete, the master restores configurations. In this situation, configurations on the AP have existed.

2

The master uses the DCN function to detect the AP and identify the AP's PnP status.

NOTE:

In normal situations, the AP's PnP status is complete. If the AP restarts for configuration clearing, its PnP status is initial.

3

The AP establishes NETCONF and control channels to the master.

An AP Goes Offline

Figure 3-9 shows the AP going-offline process.

Figure 3-9 AP going-offline process

Table 3-4 describes the going-offline process.

Table 3-4 Going-offline process

Step

Description

1

When the AP's routing information is deleted from the routing tables of the master, the master detects that the AP has gone offline and perform no action.

2

The master reports to the NMS information about the AP that goes offline.

An AP Migrates

Figure 3-10 shows the PnP process after the AP migrates. The AP migrates from Masters 1 to Master 2.

Figure 3-10 PnP process after the AP migrates

Table 3-5 describes the PnP process.

Table 3-5 PnP process

Step

Description

1

A manager deletes the AP's ESN configuration from Masters 1.

2

The manager uses a master or the NMS to log in to the AP and delete the AP's basic configurations and PnP status.

3

The AP starts a PnP process with Master 2. For details, see An AP Goes Online for the First Time.

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Updated: 2019-01-03

Document ID: EDOC1100055118

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