> Source: [sk112160](https://support.checkpoint.com/results/sk/sk112160)

# sk112160 - IPSec instability with IKEv2

| Property | Value |
|----------|-------|
| Solution ID | sk112160 |
| Date Created | 2016-06-27 |
| Last Modified | 2019-08-18 |
| Technical Level | Advanced |

## Symptoms

- * IPSec instability with IKEv2.
* When configure "IKEv2 only", have some tunnel instability (sometime tunnel is up or down without configuration change and even though permanent tunnel is configured).
* When configure "prefer IKEv2, support IKEv1", have some tunnel instability (sometime tunnel is up or down without configuration change and even though permanent tunnel is configured).
* When configure "IKEv1 for Ipv4", VPN tunnel is up every time without issue.

## Cause

IKEv2 Auth exchange fails if more than one certificate is provided by initiator.

## Solution

This solution requires authentication. Please log in to view the full solution.

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