Common problems on a WLAN

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Problems on a WLAN are classified into the following types:
- Network-side problems
- Insufficient bandwidth
- Link faults
- License restraints (only for ACs)
- Incorrect configurations
- AP-side problems
- Incorrect AP working mode
- Power supply failures
- Faults of network cables connected to APs
- Radio coverage problems
- Co-channel interference
- Improper channel distribution
- Insufficient antenna coverage
- Faults of components in an indoor distributed WLAN system

Other related questions:
What are common problems on a WLAN network
Problems on a WLAN network are classified into the following types: - Problems at the network side a) Insufficient bandwidth b) Link failures c) License restriction d) Incorrect configuration - Problems at the AP side a) Incorrect AP working mode b) Power supply failures c) Faults of network cables connected to APs - Radio coverage problems a) Co-channel interference b) Improper channel distribution c) Insufficient antenna coverage d) Faults of passive devices in the antenna system

Common WLAN components
Common WLAN components include the following: - Power splitter: splits one channel of signals into two or more channels with equal power. - Coupler: divides a signal on an input port into uneven signals on two output ports. - Attenuator/Load: reduces the amplitude or power of a signal to make the input signal to reach a secure or an ideal level. The load is a special attenuator with unlimited attenuation. The load connects to the unused output radio port, preventing radio interference. - Combiner: combines radio signals of multiple systems and distributes receive signals over one channel to ports of each system without interference. Combiners are classified into single-band combiners and multiple-channel combiners. - Connector: N-type and SMA connector - Protection components: surge protector, outdoor optical fiber tube, ground cable, and waterproof tape

Common installation problems of the FusionInsight software
Common interconnection problems of ADSL and VDSL interfaces
Problem description: The ADSL/VDSL interface cannot be activated. Handling process: 1. Investigate the cables connected to the AR xDSL interface, and notify the operator to check the cables. 2. If the AR card is equipped with only one ADSL/VDSL interface, confirm with the operator whether bonding is configured on the DSLAM on the peer end. 3. Separate the xDSL cables from electromagnetic interference sources and keep the line far away from the electromagnetic interference sources. 4. If the problem is not resolved after the preceding steps, contact Huawei post-sales engineers to determine whether it is an IOP interconnection problem. Note: After the preceding steps, the most common interconnection problems of ADSL/VDSL interfaces can be resolved or filtered out. Root causes: 1. Cables connected to the ADSL/VDSL interface do not work normally. 2. The configurations of ADSL/VDSL interfaces on the AR router and DSLAM are not consistent. 3. Electromagnetic interference sources, such as motors, transformers, and generators, are located in the route of the xDSL cable. 4. xDSL interconnection problems occur.

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.

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