> Source: [sk162873](https://support.checkpoint.com/results/sk/sk162873)

# sk162873 - Traffic loss during policy installation and "Detected Tx Unit Hang" messages in messages file

| Property | Value |
|----------|-------|
| Solution ID | sk162873 |
| Date Created | 2019-10-07 |
| Last Modified | 2019-11-04 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * Traffic outage is seen during policy installation. Issue happens even during relatively lower traffic hours.
* Following messages are seen in messages files during the policy install -

  ```
  
  Jul 9 16:09:26 20xx  kernel: [3261783.967373] igb 0000:05:00.3: Detected Tx Unit Hang
  Jul 9 16:09:26 20xx  kernel: [3261783.967373] Tx Queue <0>
  Jul 9 16:09:26 20xx  kernel: [3261783.967373] TDH <0>
  Jul 9 16:09:26 20xx  kernel: [3261783.967374] TDT <0>
  Jul 9 16:09:26 20xx  kernel: [3261783.967374] next_to_use <0>
  Jul 9 16:09:26 20xx  kernel: [3261783.967375] next_to_clean <116>
  Jul 9 16:09:26 20xx  kernel: [3261783.967375] buffer_info[next_to_clean]
  Jul 9 16:09:26 20xx  kernel: [3261783.967376] time_stamp <369be8cf6>
  Jul 9 16:09:26 20xx  kernel: [3261783.967376] next_to_watch 
  Jul 9 16:09:26 20xx  kernel: [3261783.967376] jiffies <369be98bb>
  Jul 9 16:09:26 20xx  kernel: [3261783.967377] desc.status <128001>
  ```

* Increasing tx-ringsize did not help

## Solution

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