# "cannot access /sys/class/net/<interface>/queues: No such file or directory" error in mq_mng.elg file

## Product
Multi-Domain Security Management, VSX (Traditional)

## Version
R80.40 (EOS), R81 (EOS), R81.10 (EOS), R81.20

## Last Modified
2024-03-13

## Symptoms
- After a reboot, the Multi-Queue configuration is incorrect when Management Data Plane Separation (MDPS), VSX, or both are enabled.

**Notes**:
  - Multi-Queue is set to auto.
  - CoreXL instances and interfaces are affined to the same CPU cores.
- The _mq_mng.elg_ file contains these errors:

```
[INFO] mq_driver.py:181:apply_state():  Apply state [1] queues num [20] cores
[0, 24, 1, 25, 2, 26, 3, 27, 4, 28, 5, 29, 6, 30, 7, 31, 8, 32, 9, 33] no_reset[False]

[ERROR] mq_mng:46:<module>(): Error [ls: cannot access /sys/class/net/<interface>/queues: No such file or directory
```
- Example output of the `mq_mng -o` command:
```
eth2-01        i40e        Up       Dynamic (2/2)  18-35,54-71
```

## Cause
The affinity settings do not apply to namespaces, and the namespaces do not appear in the _/sys/class/net_ directory of the Virtual System (VS), Management Plane (mplane), and Data Plane (dplane).

As a result, Multi-Queue might affine CoreXL instances and interface queries to the same CPU cores.

## Solution
This problem was fixed. The fix is included in:
- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 43
- [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 131
- [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 89
- [Jumbo Hotfix Accumulator for R80.40](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.40/Default.htm) starting from Take 211

If you choose not to upgrade, Check Point can supply a **Hotfix**. [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.

For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

#### NOTE
This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties

Access Level: General

Status: Approved by TAC

Date Created: 2023-07-17

Last Modified: 2024-03-13