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

Product: SecureXL  
Version: R81 (EOS), R81.10 (EOS)  
Last Modified: 2024-07-01

## Symptoms

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

## 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:

1. **fwmultik_input_queue_len** (default value 2048)  
2. **fwmultik_prio_queue_len_limit** (default value 512)  
3. **fwmultik_prio_conn_token_limit** (default value 128)

It is suggested to 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).

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).

#### NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties

- Access Level: General  
- Status: Approved by TAC  
- Date Created: 2024-01-25  
- Last Modified: 2024-07-01