BugZero | Cisco BugID CSCwb03072 - 100G-LR4 doesn't linkUP after 100G-ZR4 on Tortin

Cisco - Defect ID: CSCwb03072

100G-LR4 doesn't linkUP after 100G-ZR4 on Tortin

Cisco - Defect ID: CSCwb03072

100G-LR4 doesn't linkUP after 100G-ZR4 on Tortin

Last updated on February 23rd, 2026

BugZero Risk Score
6.1 Medium

Overall: 6.1

Severity: 6.4

Lifecycle: 9.1

Popularity: 4.6

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Bug Details

Description

Symptom

Connect 100G-LR4 after 100G-ZR4 is removed.

Conditions

Connect 100G-LR4 after 100G-ZR4 is removed.

Workaround

Fec_supported was made 1.

Further Problem Description

Connect 100G-LR4 after 100G-ZR4 is removed.

Change history

2025-01-26 Added: 7.6.2

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Cisco - Defect ID: CSCwb03072

100G-LR4 doesn't linkUP after 100G-ZR4 on Tortin

Cisco - Defect ID: CSCwb03072

100G-LR4 doesn't linkUP after 100G-ZR4 on Tortin

Last updated on February 23rd, 2026

BugZero Risk Score6.1 Medium

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Links

Top Cisco Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.1 Medium