> Source: [sk151452](https://support.checkpoint.com/results/sk/sk151452)

# sk151452 - Slow upload speeds with 12000/23000 10GB interface

| Property | Value |
|----------|-------|
| Solution ID | sk151452 |
| Date Created | 2019-04-23 |
| Last Modified | 2019-04-28 |
| Technical Level | Advanced |
| Products | Security Gateway, Hardware |
| Versions | R82.10, R82, R81.20, Not Version-Specific |
| OS | Gaia |

## Symptoms

- Using Single mode Fiber with the CPAC-TR-10SR received normal speeds in R77.XX but after upgrade to R80.XX seeing significant performance degradation, specifically with Upload speeds.

## Cause

The CPAC-TR-10SR transceiver lists the supported mode as Multi-Mode. Although it may have worked normally with single mode fiber in the past it has been observed that R80.XX experiences significant degredation.

## Solution

This solution requires authentication. Please log in to view the full solution.

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