> Source: [sk35466](https://support.checkpoint.com/results/sk/sk35466)

# sk35466 - Active member does not send Sync packets to Standby member in ClusterXL High Availability mode

| Property | Value |
|----------|-------|
| Solution ID | sk35466 |
| Date Created | 2008-07-02 |
| Last Modified | 2019-01-08 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * The Active member does not send sync packets to the Standby member in ClusterXL HA New mode.  

* Kernel debug on the Active cluster member (`fw ctl debug -m fw + sync`) shows messages similar to these :
  * FW-1: fwlddist_adjust_buf: record too big for sync. update fwlddist_set for table 8158 failed. fwlddist_state=*1b*
  * FW-1: fwlddist_adjust_buf: currently full=*3ffe* , requesting *25* more. max=*4000*. request failed.
  * fwlddist_set: Failed to adjust buffer with nword *37*

## Cause

The Delta Sync packets queue is full, or a Delta Sync update is bigger than allowed.

## Solution

* In case currently full=0, there is an update is too big to sync please contact support for further assistants.

* In case currently full\>0 please increase the packet queue size as described below

```

 Note: currently full value is in the Kernel debug mentioned above. 
```

### Procedure for increasing the buffer size:

1. Getting the current value:

**`[Expert@HostName]# fw ctl get int fwlddist_buf_size.`**   

2. The new size should be double the current size of fwlddist_buf_size.

3. On all cluster members (Active and Standby) set the value of kernel parameter 'fwlddist_buf_size to new size.

It is not possible to change the value of this kernel parameter on-the-fly. Therefore, follow the instructions in sk26202 to set this value permanently.  

4. In order to see the current value, run this command:

**`[Expert@HostName]# fw ctl get int fwlddist_buf_size`**

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