> Source: [sk61143](https://support.checkpoint.com/results/sk/sk61143)

# sk61143 - Traffic is dropped by CoreXL with "fwmultik_inbound_packet_from_dispatcher Reason: Instance is currently fully utilized"

| Property | Value |
|----------|-------|
| Solution ID | sk61143 |
| Date Created | 2011-02-22 |
| Last Modified | 2026-05-22 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20, R81.10 (EOS), R81 (EOS) |
| OS | Gaia |

## Symptoms

- * Some traffic does not pass through the Security Gateway when CoreXL is enabled.
* The CPU is fully utilized by a specific CoreXL Firewall instance (fw_worker).
* The remaining CoreXL Firewall instances are not utilizing the CPU cores.
* Running the kernel debug `fw ctl zdebug -m fw + drop` shows that the CoreXL Firewall instance drops specific traffic:  
  `dropped by fwmultik_inbound_packet_from_dispatcher Reason: Instance is currently fully utilized`
* Kernel drops are seen when running the command `fw ctl zdebug + drop`:  
  `cphwd_pslglue_handle_packet_cb Reason: F2P: Instance is currently fully utilized`
* Kernel drop are seen when running the command `fw ctl zdebug + drop``:`  
  `

  ``fw4_0];fw_log_drop_ex: Packet proto=6 10.92.80.41:3268 -> 10.92.142.173:55933 dropped by fwkdrv_enqueue_packet_user_ex Reason: Instance is currently fully utilized;``
  `

## Cause

The CoreXL input queue is not large enough to handle the traffic.

## Solution

This solution requires authentication. Please log in to view the full solution.

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