> Source: [sk176623](https://support.checkpoint.com/results/sk/sk176623)

# sk176623 - Cannot establish GRE tunnel in Spark Firewall after reboot

| Property | Value |
|----------|-------|
| Solution ID | sk176623 |
| Date Created | 2021-11-30 |
| Last Modified | 2022-07-12 |
| Technical Level | General |
| Products | Spark Firewall (Locally Managed) |
| Versions | R81.10.X |
| Platform | 1570R, 1500, 1600, 1800 |

## Symptoms

- In Quantum Spark Appliances, cannot establish GRE tunnel after the appliance reboots.

## Solution

[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](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management 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).

<br />

As a workaround to re-establish the tunnel, you can fetch the policy via the CLI or clear the connections table.

**Clish command to install the policy:**

`fetch policy mgmt-ipv4-address <IP_Address>`

**Clish command to clear the connections table:**   

`fw tab -t connections -x`

<br />

[](https://www.checkpoint.com/support-services/contact-support/)

<br />

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