> Source: [sk42359](https://support.checkpoint.com/results/sk/sk42359)

# sk42359 - SecureXL and Sticky Decision Function in ClusterXL Load Sharing mode

| Property | Value |
|----------|-------|
| Solution ID | sk42359 |
| Date Created | 2009-07-15 |
| Last Modified | 2020-09-08 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- When SecureXL license is installed on the Security Gateways (on cluster members), policy installation fails with:  
`
Error message: Installation failed. Reason: Invalid arguments passed to Policy installation function. (message from member <`*Member_Name* `> )`  
`
Warning: Since acceleration is not supported with Sticky Decision Function, acceleration will be disabled. To enable acceleration, please uncheck sticky decision function from Gateway Cluster Properties->ClusterXL->Advanced [ SecureXL warning no. 96 ].`  
`
Warning: Since the acceleration device on this gateway does not support Cluster configuration, acceleration will be disabled. Please refer to the acceleration device documentation for more details [ SecureXL warning no. 72 ]. ( message from member firewall1 ^) `

## Solution

**Starting from R80.20,** Sticky Decision Function (SDF) was completely removed. Connection stickiness is achieved via other methods that don't require disabling SecureXL.  

For versions R80.20 and higher refer to: [sk169154 -](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk169154)  
[Asymmetric connections in ClusterXL R80.20 and higher](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk169154)**In pre-R80.20** , SecureXL and Sticky Decision Function in ClusterXL Load Sharing mode are *not* supported together.  

The following **two** options are available:

* Either disable SecureXL on each cluster member,
* Or disable Sticky Decision Function in ClusterXL object in SmartDashboard and install policy.

**Note: When disabling or re-enabling Sticky Decision Function (SDF) you must install policy twice otherwise you SecureXL status will display "Waiting for Policy"**

This limitation is described in every *ClusterXL Administration Guide* ([R77.X](http://supportcontent.checkpoint.com/documentation_download?id=24800), [R80.10](http://downloads.checkpoint.com/dc/download.htm?ID=54804)) - Chapter 'Sticky Connections'.

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