BugZero | Fortinet BugID 1271259 - Transceiver issue occurs when using FR-1 QSFP 100G...

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Last updated on June 2nd, 2026

BugZero Risk Score
5.7 Medium

Overall: 5.7

Lifecycle: 7.3

Community: 3.7

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Bug Details

Priority: Unspecified
Status: Open
Impacted Service: Existing Known IssuesModel Specific

Description

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Change history

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Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Last updated on June 2nd, 2026

BugZero Risk Score
5.7 Medium

Bug Details

Links

Top Fortinet Defects

Ready to prevent the next vendor outage?

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Last updated on June 2nd, 2026

BugZero Risk Score
5.7 Medium

Bug Details

Links

Top Fortinet Defects

Ready to prevent the next vendor outage?

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Last updated on June 2nd, 2026

BugZero Risk Score5.7 Medium

Bug Details

Links

Top Fortinet Defects

Ready to prevent the next vendor outage?

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Fortinet - Defect ID: 1271259

Transceiver issue occurs when using FR-1 QSFP 100G with FortiGateWorkaround: Set mediatype to LR4 and disable forward-error-correction when speed is 100Gfull

Last updated on June 2nd, 2026

BugZero Risk Score5.7 Medium

Bug Details

Links

Top Fortinet Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
5.7 Medium

BugZero Risk Score
5.7 Medium