BugZero | F5 BugID 509276 - VXLAN tunnels with floating local addresses genera...

F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

Last updated on July 18th, 2026

BugZero Risk Score
8.6 High

Overall: 8.6

Severity: 9.1

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 2-Critical
Status: Verified
Impact Category: TMOS

Description

Symptoms

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on the standby device.

Impact

Incorrect gratuitous ARPs are generated on the standby device.

Conditions

A VXLAN tunnel with a floating local address on the standby device.

Workaround

None

Fix Information

VXLAN tunnels with floating local addresses no longer generate incorrect gratuitous ARPs on the standby device.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed versions: 12.0.0, 11.5.3

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.0.0, 11.5.3

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F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

F5 - Defect ID: 509276

VXLAN tunnels with floating local addresses generate incorrect gratuitous ARPs on standby device

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.6 High

BugZero Risk Score
8.6 High