AP online failure
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Confirm fault information.
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- Check whether the AP is new or added among APs in a batch.
- Check the AP authentication mode.
- Check whether the AC's source interface can ping the AP.
- Check whether the versions of the AC and AP match.
- Check whether Layer 2 or Layer 3 networking is used. If Layer 3 networking is used, check whether Option 43 is configured on the DHCP server to specify the AC's source interface.
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Collect information.
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- Check AP online information.
- Check basic information about the AC.
display version, display license resource usage, display capwap configuration, and display ap global configuration
- Check the reason for the AP online failure on the AC.
display ap all, display ap online-fail-record all and display ap unauthorized record
- Test the connectivity between the AC's source IP address and the AP.
<AC> ping - source-ip -system-time destination-ip
<AC> ping -s 9600 -c 1000 -m 100 -a source-ip system-time destination-ip
- Collect AP trace information on the AC.
[AC] display trace object //Run this command before the trace operation to ensure that no other AP or STA is traced.
[AC] trace enable
[AC] trace object mac-address x-x-x //x-x-x indicates the MAC address of the AP that fails to go online.
Disable the trace function after the trace operation is executed.
[AC] undo trace enable
[AC] undo trace object all
- Confirm AP online information.
- Check basic information about the AP.
display system-information and display ip interface brief
- Check AP online information in the diagnostic view.
[AP-diagnose] display ac-list or display dhcp client //Check the AC list.
[AP-diagnose] display capwap link all //Check the CAPWAP link status.
[AP-diagnose] display diag-logfile buffer //Check diagnostic log buffer information.
[AP-diagnose] display arp history
- Check AP CAPWAP debugging information.
<AP> debug capwap all
<AP> terminal debug
<AP> terminal monitor
After the commands are executed, disable the debugging function.
<AP> undo debug all
<AP> undo terminal debug
<AP> undo terminal monitor
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Random AP offline
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Confirm fault information.
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- Determine whether this fault occurs at, a low probability, high probability, or in a fixed time period.
- Check whether the wired network is normal.
- Check whether the ping operation between the AC's source interface and the AP encounters a ping failure, packet loss, or a long delay.
- Check whether the network has been changed recently, for example, the network structure has been adjusted, configurations have been added on the wired side, or the device has been powered off and restarted.
- Check whether the AP frequently goes online and offline due to its own unexpected restarts. If so, collect necessary information by referring to Unexpected device restart.
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Collect information.
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- Run the following commands on the AC.
- Check the reasons why the AP goes online and offline.
display ap offline-record { all | mac-address x-x-x } //Reason why the AP goes offline.
display ap online-fail-record all //Reason why the AP fails to go online.
- Check whether packet loss occurs when the AC's source interface pings the AP.
Ping the IP address of the AP from the CAPWAP source interface: <AC> ping -c 100 -a capwap-source-ip -system-time AP-ip
- Check other information.
display health, display cpu-defend statistics wired, display logbuffer, display trapbuffer, and display ap port all (The commands must be executed twice or more.)
- Run the following commands on the AP.
- Check AP system information.
display system-information
- Check AP diagnostic logs and CAPWAP link information (diagnostic view).
display diag-logfile buffer, display capwap link all, and display arp history
- Check general gateway information. (When a Huawei device functions as a gateway, the method of querying the MAC address table and ARP table is the same as that used on the AC.)
display health //Device health status, including the CPU and memory usage
display mac-address flapping record //MAC address flapping records
display arp ip-conflict track //ARP conflict records
display stp brief / display stp tc-bpdu statistics //STP status information
display logbuffer //Device log information
display trapbuffer //Device alarm information
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Dual-node scenario (configuration synchronization)
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Confirm fault information.
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- Check whether configurations are synchronized through the HSB channel.
- Check whether configurations are synchronized from the master AC to the backup AC.
- Check whether models and versions of the master and backup devices are the same. (This requirement does not apply to versions later than V200R019C00.)
- Check whether the backup configurations are correct.
NOTE: Only public configurations are synchronized. Private configurations are not synchronized.
Manually synchronize configurations on the master AC. If public configurations on the master AC are inconsistent with those on the backup AC, the backup AC restarts.
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Collect information.
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- Check basic device information.
display version, display patch-information, display capwap config, display current-configuration interface vlanif X, display ip interface brief, display arp track, and display arp ip-conflict track
- Check the configuration synchronization status.
display sync-configuration { status | master-redundancy }
- Check the reachability between source interfaces.
- display arp | include
- Enable IP addresses of the primary and secondary source interfaces to ping each other.
- Check diagnostic information about the master and backup ACs.
display diagnostic-information
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Dual-node scenario (abnormal AP status)
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Confirm fault information.
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- If HSB is configured, check whether the HSB channel is normal.
- Check whether the configurations of the active and standby ACs are correct and whether the AP configurations on the active and standby ACs are the same.
NOTE: After the AP goes online, you need to restart the AP and enable the dual-node function on the AP.
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Collect information.
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- Check AP information on the AC.
display ap all, display current-configuration | include ap id X, and display ap global configuration
Enable the AC's source IP address to ping the AP address.
- Check the HSB channel status on the active and standby ACs.
display hsb-group 0 and display hsb-service 0
- Check the CAPWAP link status.
display capwap link all and display diag-logfile buffer
Enable the AP's source IP address to ping the AC's source interface address.
- Check diagnostic information about the active and standby ACs.
display diagnostic-information
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Wireless bridging
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Confirm fault information.
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- Confirm the fault symptom and determine whether a bridging failure or unstable bridging occurs.
- Check the physical environment, including the distance between two APs (unit: m), whether obstacles exist between the two APs, and the required wireless backhaul bandwidth.
- Check the AP type, antenna type (for example, external antenna), and antenna ports on which the antennas are installed.
- Check whether the antennas are aligned using the antenna alignment function on the CloudCampus APP.
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Collect WDS network information.
NOTE: Only APs running V200R019C00 and earlier versions support WDS.
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- Check the WDS network structure: hand-in-hand or back-to-back.
- Check the VAP type: AP VAP or STA VAP.
2.4 GHz: VAP12 is an AP VAP and VAP13 is a STA VAP.
5 GHz: VAP28 is an AP VAP and VAP29 is a STA VAP.
- Check the radio link setup status.
display wlan wds link all, display ap all , display channel switch-record { all | ap-id x radio y }
- Check the WDS configuration.
WDS profile reference information: display ap-group name xxx, display ap config-info ap-name huawei
WDS profile configuration: display [ references ] wds-profile { all | name xxx }, display [ references ] wds-whitelist-profile { all | name xxx }
- Check country code information.
display [ references ] regulatory-domain-profile { all | name xxx }
- Check AP diagnostic information.
- AP VAP: iwconfig radio x vap 12, display diag-logfile buffer, wds bridge-link-list, display wds link history
- STA VAP: display wifi { candidate-ap | scan-entry } radio x vap 13, display kernel-logbuf record-range 1
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Collect mesh network information.
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- Check the mesh network structure.
- Check the radio link setup status.
display wlan mesh link all, display ap all , display channel switch-record { all | ap-id x radio y }
- Check the mesh configuration on the AC.
Mesh profile reference information: display ap-group name xxx, display ap config-info ap-name huawei
Mesh profile configuration: display [ references ] mesh-profile { all | name xxx }, display [ references ] mesh-whitelist-profile { all | name xxx }
- Check country code information.
display [ references ] regulatory-domain-profile { all | name xxx }
- Check the mesh network configuration on the AP (diagnostic view).
- Check mesh neighbor information (diagnostic view).
- V200R019C00 and earlier versions:
display wsrv mesh-neighbour //Neighbor data statistics
display wsrv mesh-link-info //Mesh link information
- V200R019C10 and later versions:
display umac mesh neighbor //Neighbor data statistics
display umac mesh link-info //Mesh link information
- Check the logs generated during mesh neighbor relationship setup (diagnostic view).
display diag-logfile buffer //Diagnostic log buffer information
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