# The interface link state is down on Security Gateway in SecureXL User Mode (UPPAK) working with Jumbo Frames

## Product
Security Gateways

## Version
R81.20

## OS
Gaia

## Platform
9000

## Last Modified
2024-11-18

## Symptoms

- The interface link state is down on Quantum Force 9000 appliances in SecureXL User Mode (UPPAK) when working with Jumbo Frames.
- The _/var/log/usim_x86.elg_ file has many entries for:

```
[uspace];[tid_1];[UPPAK];cpfifo_port_allocate_mbufs: DPDK CPFIFO Out of mbuf
[uspace];[tid_1];[UPPAK];m_get: allocation failure
```

- The command: `# ipsctl -a | egrep 'rte.*mbuf'`

Returns a very low number of mbufs.

## Cause
When working with Jumbo Frames in SecureXL User Mode (UPPAK) on Quantum Force 9000 series appliances, incorrect memory allocation calculations may cause intermittent link failures.

## Solution
This problem was fixed. The fix is included in:

- [Check Point Quantum R82](https://support.checkpoint.com/results/sk/sk181127)
- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 90

If you choose not to upgrade, Check Point can supply a **Hotfix**.

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](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management 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: 2024-11-12
Last Modified: 2024-11-18