> Source: [sk185050](https://support.checkpoint.com/results/sk/sk185050)

# sk185050 - The kernel parameter 'fw_link_state_propagation_enabled' fails to be set permanently 

| Property | Value |
|----------|-------|
| Solution ID | sk185050 |
| Date Created | 2026-06-15 |
| Last Modified | 2026-06-22 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * When you run on the Security Gateway this command in Expert mode to persist the kernel parameter:/p\>

  ```
  
  fw ctl set -f int fw_link_state_propagation_enabled 1
  ```

  The command fails with errors, for example:

  ```
  
  kiss_params: failed to update VS 0
  Set operation failed: failed to get parameter fw_link_state_propagation_enabled
  Killed
  ```

* After the failure, the runtime value may temporarily appear as enabled:

  However, the persistent configuration file is not updated:

  ```
  
  grep fw_link_state_propagation_enabled $FWDIR/boot/modules/fwkern.conf
  (no output)
  ```

* After a reboot, the value reverts to the default:

  ```
  
  fw ctl get int fw_link_state_propagation_enabled
  fw_link_state_propagation_enabled = 0
  ```

## Cause

The persistence flow does not complete the write operation for Virtual System 0 (VS0). The system does not add the parameter to `$FWDIR/boot/modules/fwkern.conf`, so the value does not survive a reboot.

As a result:

* The CLI reports an error when attempting to persist the value.
* The runtime value may temporarily exist in memory.
* The parameter is not written to `$FWDIR/boot/modules/fwkern.conf`.
* The value resets after reboot because no persistent entry exists.

## 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 it. For faster resolution and verification, collect these files:

1. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) file from the Management Server involved in the case.
2. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) file from the Security Gateway / each Cluster Member / Security Group involved in the case.

**Hotfix installation instruction**   
Refer to [How to Install a Hotfix](https://support.checkpoint.com/results/sk/sk168597).  

Temporary workaround (use only until the Hotfix is installed):
--------------------------------------------------------------

1. On the Security Gateway in Expert mode add the kernel parameter to the *fwkern.conf* file manually with the command:   
   `echo 'fw_link_state_propagation_enabled=1' >> $FWDIR/boot/modules/fwkern.conf`
2. Reboot to apply the persistent parameter.

---

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