An AP restarts repeatedly or its IP address changes frequently

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During an AP upgrade through FTP or SFTP, if the AP fails to establish a connection with an FTP or SFTP server, the CAPWAP module makes the AP restart.
In Layer 3 networking, if Option 60 or Option 43 is not configured on the DHCP server, an AP cannot obtain the AC's source IP address to establish a CAPWAP tunnel with the AC. As a result, the AP restarts and obtains IP addresses repeatedly.
You can run the reset ip pool { interface pool-name | name ip-pool-name } { start-ip-address [ end-ip-address ] | conflict } command to release a conflicting IP address.

Other related questions:
An AP restarts repeatedly or its IP address changes frequently
During an AP upgrade through FTP or SFTP, if the AP fails to establish a connection with an FTP or SFTP server, the CAPWAP module makes the AP restart. In Layer 3 networking, if Option 60 or Option 43 is not configured on the DHCP server, an AP cannot obtain the AC's source IP address to establish a CAPWAP tunnel with the AC. As a result, the AP restarts and obtains IP addresses repeatedly. You can run the reset ip pool { interface pool-name | name ip-pool-name } { start-ip-address [ end-ip-address ] | conflict } command to release a conflicting IP address.

Will the AP ID be changed after an AC restart
No.

Common operations for managing WLAN APs
Common operations for managing APs 1. Log in to an AC and change an AP's login user name and password. - V200R005: [HUAWEI] wlan [HUAWEI-wlan-view] wlan ap username huawei password cipher Enter the password (plain-text password of 8-32 characters or cipher-text password of 32 or 56 characters): Confirm password: [HUAWEI-wlan-view] commit ap 1 //Run the display ap command to obtain the AP ID if you forget the AP's login password. Warning: Committing configuration may cause service interruption, continue?[Y/N] :y To restore the default user name and password, run the undo wlan ap username command. By default, the user name is admin and password is admin@huawei.com. - V200R006: [HUAWEI] wlan [HUAWEI-wlan-view] ap-reset ap-id 1 Enter the password (plain-text password of 8-32 characters or cipher-text password of 48 or 68 characters): Confirm password: To restore the default user name and password, run the undo ap username command. By default, the user name is admin and password is admin@huawei.com. 2. Restart an AP. - V200R005: [HUAWEI] wlan [HUAWEI-wlan-view] ap-reset id 1 Warning: Reset AP, continue?[Y/N]:y Operation on the web platform: Choose Configuration > AP Management > AP Information. Select an AP and click Restart. - V200R006: [HUAWEI] wlan [HUAWEI-wlan-view] ap-reset ap-id 1 Warning: Reset AP, continue?[Y/N]:y Operation on the web platform: Choose Maintenance > AP Maintenance > AP Restart. Select an AP and click Restart. 3. Restore factory settings. - V200R005: Run the ap-manufacturer-config id ap-id command to restore factory settings of an AP. - V200R005: Run the ap manufacturer-config { ap-name ap-name | ap-mac ap-mac | ap-id ap-id } command to restore factory settings of an AP. 4. Change the AP name. - V200R005: [HUAWEI-wlan-view] ap id 1 [HUAWEI-wlan-ap-1] ap-sysname ap_01 Operation on the web platform: Choose Configuration > AP Management > AP Information. Click the icon of a specific AP and change the AP name. - V200R006: [HUAWEI-wlan-view] ap-rename ap-name N1-2 new-name N2-2 Operation on the web platform: Choose Configuration > AP Configuration > AP Information. Click the name of a specific AP and change the AP name. 5. Delete an AP. - V200R005: [HUAWEI-wlan-view] undo ap id xx Operation on the web platform: Choose Configuration > AP Management > AP Information. Select an AP and click Delete. If ACs work in active/standby mode, you are advised to disconnect the AP and delete the AP from both the active and standby ACs. - V200R006: [AC6605-wlan-view] undo ap-id xx Operation on the web platform: Choose Configuration > AP Configuration > AP Information. Select an AP and click Delete. If ACs work in active/standby mode, you are advised to disconnect the AP and delete the AP from both the active and standby ACs. 6. IP addresses of APs cannot be modified on an AC.

What are the differences between AP restart modes and what are their application scenarios
You can restart an AP in the following ways: run the reset command on the AC, log in to the AP and restart it, hold down the RESET button on the AP, and power off and on the AP. The differences and application scenarios of these restart modes are as follows: - Run the reset command on the AC: Run the ap-reset { all | id ap-id | ap-type { type ap-type | type-id type-id } } command in the WLAN view to restart a specified AP or APs in batches. This command applies only to online APs. - Log in to the AP and restart it: Log in to the AP and run the reboot command in the user view to restart the AP. You can restart an AP using this method only after you log in to the AP using Telnet or through the console port. This method is used to restart APs that are not online on the AC. You can connect a PC to the wired interface of the AP and log in to the AP using Telnet. - Hold down the RESET button on the AP: Using this method, you can restart an AP without the need to get the AP online or log in to the AP. - Power off and on the AP: If the AP uses PoE power supply, run the undo poe enable and poe enable commands in the interface view of the power sourcing equipment (PSE) to restart the AP.

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