BugZero | F5 BugID 746266 - A vCMP guest VLAN MAC mismatch across blades.

F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: TMOS

Description

Symptoms

The vCMP guests running on blades in a single chassis report different MAC addresses on a single VLAN upon host reboot for the vCMP guest.

Impact

Incorrect MAC addresses are reported by some blades.

Conditions

This issue may be seen when all of the following conditions are met: -- One or more blades are turned off completely via AOM. -- There are two VLANs. -- You deploy a multi-slot guest with the higher lexicographic VLAN, and assign the lower VLAN to the guest. -- Reboot the host.

Workaround

None.

Fix Information

There is no longer a vCMP guest VLAN MAC mismatch across blades under these conditions.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2

Fixed versions: 15.0.0, 14.1.2.3, 13.1.3, 12.1.5

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 15.0.0, 14.1.2.3, 13.1.3, 12.1.5

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F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

F5 - Defect ID: 746266

A vCMP guest VLAN MAC mismatch across blades.

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium