> Source: [sk181921](https://support.checkpoint.com/results/sk/sk181921)

# sk181921 - Messages logs showing "kernel: [SIM4];pkt_handle_f2v_if_needed: dropping packet (failed to send notification), conn:"

| Property | Value |
|----------|-------|
| Solution ID | sk181921 |
| Date Created | 2024-01-25 |
| Last Modified | 2024-07-01 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.10 (EOS), R81 (EOS) |

## Symptoms

- This error message shows `/var/log/messages showing "kernel: [SIM4];pkt_handle_f2v_if_needed: dropping packet (failed to send notification), conn:" repetatively`

## Cause

The queue` fwmultik_pending_queue_len_limit` exceeded its designated threshold, attributed to an excessive number of f2v connections. To rectify the situation and address the leakage in the `gconn `table, a necessary Hotfix involves augmenting the queue limit.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 70
* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 141
* [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 99

The hotfix adds the ability to increase the queue size, by modifying the kernel parameter '**fwmultik_pending_queue_len_limit** ' (default value 2000).  

In addition, the following kernel parameters can be increased:  
**fwmultik_input_queue_len** (default value 2048)  
**fwmultik_prio_queue_len_limit** (default value 512)  
**fwmultik_prio_conn_token_limit** (default value 128)  

It is suggested increase these gradually by doubling the values.  
Please refer to [sk26202: Changing the kernel global parameters on Check Point Security Gateways](https://support.checkpoint.com/results/sk/sk26202)  

<br />

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://support.checkpoint.com/results/sk/sk168597).

<br />

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