> Source: [sk182735](https://support.checkpoint.com/results/sk/sk182735)

# sk182735 - IKEv2 VPN tunnels experience multiple Child SA timeouts after upgrading to R81.10 Jumbo Hotfix Accumulator Take 152 or higher

| Property | Value |
|----------|-------|
| Solution ID | sk182735 |
| Date Created | 2024-10-14 |
| Last Modified | 2024-11-13 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- * IKEv2 IKE Exchange timeouts occur after upgrading to R81.10 Jumbo Hotfix Accumulator Take 152 or Take 156.
* IKE debugs do not log any activity.
* The VPND daemon restarts with a new PID every time IKEv2 Phase 2 renegotiates a tunnel. There are no core dumps generated.
* This issue does not occur in environments using only IKEv1 tunnels.

## Cause

There is a code limitation that causes the VPND daemon to restart when IKEv2 needs to renegotiate a Child SA. Since VPND restarts, it interrupts the Child SA negotiation which causes the daemon to fail.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 171

If you choose not to upgrade, Check Point can supply a **Hotfix** . [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

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