This article applies as of PRTG 22

After adding SNMP Cisco ASA VPN Users sensor to PRTG installation, it changed to the Down status with the error message: 

The sensor exceeded the maximum number of 50 users. For more information, see https://kb.paessler.com/en/topic/64053. (code: PE246)

User limit of the SNMP Cisco ASA VPN Users sensor (PE246)

The SNMP Cisco ASA VPN Users sensor shows you the number of currently connected user accounts and the online status of a specific user account. Basically, the sensor writes every user account that uses a VPN connection on the Cisco Adaptive Security Appliance device into a list and creates a channel for each account.

If the sensor shows the error message

The sensor exceeded the maximum number of 50 users. For more information, see https://kb.paessler.com/en/topic/64053. (code: PE246)

consider the following explanations:

When does the sensor show the respective error message?

The sensor shows the error message regarding the limited number of users when the number of channels, which corresponds to the number of VPN users, exceeds 50.

Why is the sensor limited to 50 channels, that is, 50 users?

This sensor is limited to 50 channels or 50 users respectively because monitoring more than 50 VPN users might cause notable performance issues in your PRTG installation.

How can I change the Down status?

Actually, there is no real possibility to change the Down status. To clear the list of users, delete the SNMP Cisco ASA VPN Users sensor and add a new one to continue Cisco ASA VPN users monitoring. Unfortunately, this is the only way to get rid of the Down status at the moment.

In which case should I not use the SNMP Cisco ASA VPN Users sensor?

You should not use the sensor if you have more than 50 user accounts. If more than 50 users are frequently connected, you cannot use the sensor as intended.