# DHCP broadcast packets are not visible on the intended VLAN when working in SecureXL User Mode (UPPAK)

## Product
Security Gateways

## Version
R81.20, R82

## OS
Gaia

## Platform
19000, 29000, 3900, 9000, LightSpeed MLS, LightSpeed QLS

## Last Modified
2025-09-14

## Symptoms

- DHCP broadcast packets from DHCP Server/DHCP relay are not visible on the intended VLAN when operating in SecureXL User Mode (UPPAK).
- Broadcast packets from the Security Gateway may be routed to incorrect VLANs when multiple VLANs simultaneously handle broadcast traffic.
- **Affected Appliances/Versions**
  - Quantum Force 19000, 29000, 9000, QLS Lightspeed and MLS Lightspeed appliances operating either in Security Gateway or in Maestro configurations and running SecureXL User Mode (UPPAK):  
    - Issue is relevant for Check Point R82  
    - Issue is relevant for R81.20 Jumbo Hotfix Accumulator Take 96 and higher
  - Check Point Quantum Force 3900 Appliance  
    - Issue is relevant for Check Point Quantum Force 3900 Appliance factory image ( [Check Point R82.10 Image for 3900 Appliances](https://support.checkpoint.com/results/download/138048))
- In Expert mode, the output of “ _fwaccel tab -t nnexthop_” includes rows with the IP address 255.255.255.255.

## Solution

This problem was fixed. The fix is included in:
- [Jumbo Hotfix Accumulator for Quantum Force 3900 Appliances](https://support.checkpoint.com/results/sk/sk183557) starting from Take 22
- [Jumbo Hotfix Accumulator for R82](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 34
- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 111

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://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

## Article Properties

Access Level
General

Status
Approved

Date Created
2025-07-17

Last Modified
2025-09-14