> Source: [sk183333](https://support.checkpoint.com/results/sk/sk183333)

# sk183333 - Unexpected failover of a Maestro Security Group in VSX mode 

| Property | Value |
|----------|-------|
| Solution ID | sk183333 |
| Date Created | 2025-04-20 |
| Last Modified | 2025-04-21 |
| Technical Level | General |
| Products | Security Gateway, Scalable Platforms |
| Versions | R81.20, R81.10 (EOS), R81 (EOS), R81.20, R81.10 (EOS) |
| OS | Gaia |
| Platform | 26000, Maestro Orchestrator |

## Symptoms

- * In rare scenarios, a Maestro Security Group running in VSX mode fails over unexpectedly.

* The `/var/log/messages` file contains these kernel crash back traces:

  ```
  kernel:  <IRQ>  [<ffffffff8178fde0>] dump_stack+0x1e/0x20
  ```

* There are RX/TX errors / drops on the BPEth interfaces:

  ```
  
  Interface BPEth0 have issues with: RX-DRP: 552943 
  Interface BPEth1 have issues with: RX-DRP: 728245 
  Interface ethsBP1-01 have issues with: RX-DRP: 50227 
  Interface ethsBP1-02 have issues with: RX-DRP: 107328 
  ```

* The `dmesg` logs contain interface link errors:

  ```
  
  i40e 0000:65:00.3 ethsBP1-04: tx_timeout: VSI_seid: 399, Q 6, NTC: 0x270, HWB: 0x270, NTU: 0x259,
   TAIL: 0x259, INT: 0x1
  i40e 0000:65:00.3 ethsBP1-04: tx_timeout recovery level 1, hung_queue 6
  BPEth1: link status down for interface ethsBP1-04, disabling it in 200 ms
  BPEth1: link status down for interface ethsBP1-04, disabling it in 200 ms
  BPEth1: link status down for interface ethsBP1-04, disabling it in 200 ms
  ```

## Cause

A kernel crash triggered the failover. The crash occurred due to a transmission timeout (tx_timeout) when the affected interface was already down. This condition caused repeated link failures and unstable interface behavior, leading to the failover of the Maestro Security Group.

## Solution

This problem was fixed. The fix is included starting from:

* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 79
* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 158
* [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/R81.00/Take_106.htm) starting from Take Take 106

Check Point recommends to always upgrade to the [Recommended version](https://support.checkpoint.com/results/sk/sk95746) ([Security Gateway](https://support.checkpoint.com/product/73) / [VSX](https://support.checkpoint.com/product/359)).

If you choose not to upgrade, [contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for your version.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing it.  
For faster resolution and verification, collect these files:

1. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) file from the Security Gateway / each Cluster Member involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://support.checkpoint.com/results/sk/sk168597).

---

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