> Source: [sk101132](https://support.checkpoint.com/results/sk/sk101132)

# sk101132 - Although CCP mode is set to Broadcast, Delta Sync packets are sent over Sync interface(s) as multicast

| Property | Value |
|----------|-------|
| Solution ID | sk101132 |
| Date Created | 2014-06-02 |
| Last Modified | 2017-05-22 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Although CCP mode is set to Broadcast, Delta Sync packets are sent over Sync interface(s) as multicast.

  *Example of traffic capture*:

  ```
  
  23:59:07.048746 00:00:00:00:fe:01 > 01:00:5e:07:07:fa, ethertype IPv4 (0x0800), length 82: 0.0.0.0.cp-cluster > 7.7.7.0.cp-cluster: UDP, length 40
  23:59:07.048805 00:00:00:00:fe:01 > 01:00:5e:07:07:fa, ethertype IPv4 (0x0800), length 82: 0.0.0.0.cp-cluster > 7.7.7.0.cp-cluster: UDP, length 40
  23:59:07.120890 00:00:00:00:88:00 > 01:00:5e:07:07:fa, ethertype IPv4 (0x0800), length 76: 0.0.0.0.cp-cluster > 7.7.7.0.cp-cluster: UDP, length 34
  ```

* Connections initiated from the Standby member (e.g., SSH, FTP) in ClusterXL High Availability might time out when the value of kernel parameter "*fwha_sync_broadcast_ack* " is set to "1" per [sk20576](http://supportcontent.checkpoint.com/solutions?id=sk20576) (at least on the Active member).

* SSH connection fails (times out) in the following topology:  

  Host --\> (int)\[Active\](ext) --\> \[switch\] --\> (ext)\[Standby\]

  Traffic capture and cluster debug ('`fw ctl debug -m cluster + forward`') show that the SSH packet reaches the Active member and forwarded to the Standby over the Sync network (as designed).  
  However, Standby does not respond to this SSH connection.

## Cause

By the current design, setting CCP mode to Broadcast is not applied to Sync interfaces.

## Solution

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

---

# 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