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Cisco ASA VPN sensors crashed

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We have an endpoint connection on a context of a Cisco ASA 5515 for multiple clients and one day our PRTG showed many of the sensors being red. While it's possible the tunnels were down at some point they were definitely up when we did some checking afterwards, meaning that we actually have a red sensor for a functional tunnel. We tried readding the sensor but the PRTG either doesn't see the tunnel at all, meaning we cant actually find it to add it OR it sees it and we add it but it goes straight to red. We checked and most of them are ikev1 vpns. Also we still have some green and working tunnels on the same device.

We would appreciate any idea that e can test so we can fix this.

p.s. this has been working just fine for at least a year and there were no changes on either PRTG server or ASA device.

asa-context cisco-asa-vpn-sensor snmp

Created on Jul 17, 2017 12:33:18 PM by  silavric (0) 1

Last change on Jul 18, 2017 10:46:43 AM by  Luciano Lingnau [Paessler Support]



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I have done a "no snmp-server" on the asa, and then put the config back, still, behavior is just like before, some red and some green in no particular order. p.s. will wait 1 more day maybe we get a good idea and if not, open a case.

Created on Jul 18, 2017 1:17:58 PM by  silavric (0) 1



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Hello silavric,
thank you for your KB-Post and update.

We'll need to check the SNMP Data delivered by the device to troubleshoot this further. In this case please raise a support ticket and we can provide further instructions.

Best Regards,
Luciano Lingnau [Paessler Support]

Created on Jul 18, 2017 1:34:55 PM by  Luciano Lingnau [Paessler Support]



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