> Source: [sk39842](https://support.checkpoint.com/results/sk/sk39842)

# sk39842 - How to start clustering mechanism in debug mode?

| Property | Value |
|----------|-------|
| Solution ID | sk39842 |
| Date Created | 2009-04-14 |
| Last Modified | 2015-10-13 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Linux, Gaia |

## Solution

To start the clustering mechanism under debug:

1. Stop the clustering mechanism:   

   **`[Expert@HostName]# cphastop`**   

2. Start the clustering mechanism under debug:  

   * R77.20 and above:

     **`[Expert@HostName]# cphastart -d`**
   * R77.10 and lower:

     **`[Expert@HostName]# cphastart -d 1>> /var/log/cpha_debug.txt 2>> /var/log/cpha_debug.txt`**

   <br />

   <br />

3. Provide the relevant log file to [Check Point Support](http://www.checkpoint.com/services/contact/index.html):   

   * R77.20 and above:

     **`$FWDIR/log/cphastart.elg`**
   * R77.10 and lower:

     **`/var/log/cpha_debug.txt`**

**Related solutions:**

* [sk83220 (How to collect ClusterXL debug during boot)](http://supportcontent.checkpoint.com/solutions?id=sk83220)   

* [sk93306 (ATRG: ClusterXL R6x and R7x)](http://supportcontent.checkpoint.com/solutions?id=sk93306) - chapter 'ClusterXL Monitoring and Troubleshooting' - 'cphastart' and 'cphastop' commands

Note: In some cases, the '`cphamcset`' daemon was not able to start properly. Those cases were resolved by disabling and re-enabling the cluster membership via the '`cpconfig`' menu.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content