> Source: [sk184291](https://support.checkpoint.com/results/sk/sk184291)

# sk184291 - LightSpeed Acceleration Card may fail to accelerate large data TCP connections at the hardware level

| Property | Value |
|----------|-------|
| Solution ID | sk184291 |
| Date Created | 2025-11-06 |
| Last Modified | 2026-07-23 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20, R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- TCP traffic intermittently fails when it passes through the LightSpeed Acceleration Card on a Check Point Appliance.

Mostly, this issue affects large data TCP streams (for example, transferring images larger than 10 MB).

## Cause

The LightSpeed Acceleration Card may fail to accelerate large data TCP connections at the hardware level in this scenario:

1. A Bond interface in a Load Sharing mode (for example, 802.3ad) is configured on the ports of the same Acceleration Card.
2. VLAN interfaces are configured on top of this Bond interface.

## Solution

This problem was fixed. The fix is included starting from:

* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 158[](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm)

Check Point recommends to always upgrade to the [Recommended version](https://support.checkpoint.com/results/sk/sk95746) ([Security Gateway](https://support.checkpoint.com/product/73) / [VSX](https://support.checkpoint.com/product/359) / [Security Management Server](https://support.checkpoint.com/product/184) / [Multi-Domain Security Management Server](https://support.checkpoint.com/product/166) / [SmartConsole](https://support.checkpoint.com/product/191)).

If you choose not to upgrade, [contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for your version.

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 involved in the case.

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

**Documentation:**   
[LightSpeed 10/25/40/100G QSFP28 Ports Administration Guide](https://sc1.checkpoint.com/documents/Appliances/100G_Ports_AdminGuide/Default.htm)

---

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