Risks, Limitations and Assumptions

• The integration supports Critical and Recovery failure notifications for the following scenarios when App Failure Notifications are enabled in the configuration:
  • Connectivity Exception
  • Authentication Exception
• The integration sends duplicate or repeated failure alert notifications every 6 hours.
• The integration does not support automatic monitoring pause or resume actions based on the above alerts. However, you can configure metrics to monitor the wlan-controller resource and generate alerts based on threshold values.
• OpsRamp sets the default SNMP port value to 161 for connecting to the Wireless LAN Controller via SNMP. You can modify this value anytime from the application configuration page.
• Component-level thresholds can be configured at the individual resource level.
• Support for latest snapshot metrics is available starting from Gateway version 15.0.0.
• Note: Native-type filtering for Wireless LAN Controller Access Points is currently not working as expected.
  • In multiple cases within the SNMP app, when an Access Point is in a down state, no response is returned for that device.
  • The SDK app interprets this lack of response as an empty result and proceeds to delete the corresponding resources.

Troubleshooting

• Ensure all prerequisites are met.
• If the Wireless LAN Controller (WLC) integration fails to discover or monitor, perform the following troubleshooting steps:
  • Check for any alerts generated on:
    • The WLC resource
    • The gateway
    • Error logs in vprobe
  • Verify SNMP accessibility and check for connectivity or authentication failures by testing the reachability of the end device from the gateway:
    • Ping the IP address provided in the configuration from the gateway: ping <IP Address>
    • Use SNMP commands to test the end device:
      • SNMP v2 Full Walk Command: snmpwalk -v2c -c <communityString> <IP Address> .1 -t 10 -r 3 -Cc
        Example: snmpwalk -v2c -c public 2.2.2.2 .1 -t 10 -r 3 -Cc > full_snmp_walk.txt
      • SNMP v3 Full Walk Command: snmpwalk -v3 -l <securityLevel> -u <username> -a <authProtocol> -A <authPassword> -x <privProtocol> -X <privPassword> <IP Address>
        Example: snmpwalk -v3 -l authPriv -u opsramp -a SHA -A 'Pass@123' -x AES128 -X 'Pass@123' 1.1.1.1 > full_snmp_walk.txt
        The command output will be saved to full_snmp_walk.txt.
    • Try using telnet: telnet <IP Address> <Port>