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WLAN Troubleshooting Guide

About This Document
Using eDesk Pro for Network Inspection and Troubleshooting
Using Troubleshooting Insights
Risky Operations
- Hardware-Related Risky Operations
- Software-Related Risky Operations
Routine Maintenance
- Routine Maintenance Overview
- Before You Start
- Checking the Device Environment
  - Checking the Equipment Room Environment
  - Checking the Cable Status
- Checking Basic Device Information
  - Checking the Indicator Status
  - Checking for Critical or Major Alarms on an AC
- Checking the Device Running Status
- Checking Interface Information
- Checking Services
  - Checking the User Status
- Fault Information Collection and Feedback
Troubleshooting: Hardware
- Hardware Overview
- Troubleshooting Guidelines for Hardware
- Troubleshooting Cases for Hardware Faults
- Hardware FAQs
Troubleshooting: STA Experience Faults
- Troubleshooting Guidelines for STA Experience Faults
- Troubleshooting Cases for STA Experience Issues
- STA Experience FAQs
Troubleshooting: AP Joining Faults
- Troubleshooting Guidelines for AP Joining Faults
  - An AP Fails to Go Online on the AC
  - An AP Goes Offline Unexpectedly
- Troubleshooting Cases for AP Onboarding Issues
- AP Onboarding FAQs
Troubleshooting: STA Onboarding Faults
- Troubleshooting Guidelines for STA Onboarding Faults
- Troubleshooting Cases for STA Onboarding Issues
- STA Onboarding FAQs
Troubleshooting: Wireless Access Authentication Issues
- 802.1X Authentication Failures
- HTTP-based External Portal Authentication Failures
- Failures in External Portal Authentication Using the Portal Protocol
- Portal Redirection Failures
- Built-in Portal LDAP or AD Authentication Failures
- Failure to Access the Built-in Portal Page
  - Key Configuration Check
  - Common Built-in Portal Page Access Failures
- Troubleshooting Cases for STA Authentication Failures
- WLAN Authentication FAQs
Troubleshooting: Device Login Faults
- Troubleshooting Guidelines for Device Login Faults
- Device Login FAQs
Troubleshooting: Device Upgrade Faults
- Troubleshooting Guidelines for Device Upgrade Faults
- Troubleshooting Cases for Device Upgrade Failures
  - Case Study: Intelligent Upgrade Fails Because the CA Certificate on the AC Does Not Match That on the HOUP Server
  - Case Study: AP5030DN Upgrade and Mode Switching Are Abnormal Because the AP5030DN Enters the Assistant Package Mode
- Device Upgrade FAQs
Troubleshooting: Device Management Faults
- Troubleshooting Guidelines for Device Management Faults
- Device Management FAQs
Troubleshooting: Reliability Faults
- Troubleshooting Guidelines for Reliability Faults
- Troubleshooting Cases for Reliability Issues
- Reliability FAQs
Troubleshooting: Wireless Bridge Service Faults
- Troubleshooting Guidelines for Wireless Bridge Service Faults
- Wireless Bridge FAQs
Troubleshooting: Radio Management Service Faults
- Troubleshooting Guidelines for Radio Management Service Faults
  - Radio Calibration Does Not Take Effect
  - AI Roaming Does Not Take Effect
- Radio Management FAQs
Troubleshooting: Cloud Management Faults
- Troubleshooting Guidelines for Cloud Management Faults
- Troubleshooting Cases for Cloud Management Faults
  - Case Study: Fit APs Managed by a Cloud AC Fail to Go Online Due to Insufficient License Resources on the Cloud Management Platform
  - Case Study: In a VRRP Backup Scenario, a Loop Occurs on the Network When ACs Connect to the Cloud in PnP Auto-Negotiation Mode
Troubleshooting: CPE Service Faults
- Troubleshooting Guidelines for CPE Service Faults
- Troubleshooting Cases for CPE Service Faults
  - Case Study: When a CPE Roams Repeatedly, Terminals Connected to the CPE Are Intermittently Disconnected
  - Case Study: An Exception Occurs on a CPE Tunnel Due to EoGRE Configuration Changes
- CPE Service FAQs
  - How Can I Know the CPE Connected to a Wired Terminal and Its Uplink AP?
  - How Do I Collect CPE Fault Information by One Click?
Troubleshooting: Others
- Troubleshooting Guidelines for Other WLAN Service Faults
  - User Rate Limiting Does Not Take Effect
- Troubleshooting Cases for Other WLAN Service Issues
  - Case Study: Two STAs Connected to the Same SSID on the Same AP Cannot Communicate with Each Other Because the traffic-optimize bcmc deny all Command Is Executed on the Device
- FAQs About Other WLAN Services
TechNotes
- WLAN Network Optimization
- How an AP Joins an AC and Troubleshooting Any Join Failures
- How to Log In to WLAN ACs and APs
- Troubleshooting WLAN Password Issues
- AP Mode Switching - Overview, Configuration Examples, and Troubleshooting
- TechNotes: Mapping Between WACs and APs
- TechNotes: Wireless Packet Obtaining
- VLAN Deployment Guide for WLAN
- WLAN Performance Test Guide
- How to Configure Option 43 When Huawei APs Are Connected to DHCP Servers of Different Vendors
- Common WLAN Configuration Errors
Appendix: Common Information Collection and Fault Diagnostic Commands
- Information Collection
- Typical Fault Information Collection
- System Maintenance Methods
- Common Fault Diagnostic Commands
Appendix: Indicators
Contacting Huawei Technical Support

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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).

Option 43 Formats Supported by DHCP Servers of Different Vendors

Option 43 Formats Supported by DHCP Servers of Different Vendors

APs can identify three types of Option 43 formats, but Option 43 formats that can be identified by DHCP servers vary according to vendors.

The following table lists Option 43 formats that can be identified by DHCP servers of only some vendors. For details about the supported DHCP server models and configuration methods, see the corresponding product documents.

Table 19-33 Option 43 formats supported by DHCP servers of different vendors

Vendor	Suboption 1 (Hex)	Suboption 2 (Decimal)	Suboption 3 (ASCII Code)
Huawei	Supported¹	Supported	Supported²
Cisco	Not supported	Not supported	Supported
Juniper	Not supported	Not supported	Supported
Linux ISC	Not supported	Supported	Not supported
Windows	Not supported	Not supported	Supported
Infoblox	Not supported	Not supported	Supported

1. This suboption supports the configuration of only a single WAC but not multiple WACs.

2. During the configuration, you can directly enter a character string without converting the character string into ASCII code, which is simpler.

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Updated: 2023-06-02

Document ID: EDOC1000060368

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