BugZero | F5 BugID 551927 - ePVA snoop header's transform vlan should be set p...

F5 - Defect ID: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

F5 - Defect ID: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

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

On ePVA capable platform with fastl4 profile and asymetric routing on client side, ltm sends packets to the client with wrong vlan/correct mac address (or correct vlan and wrong mac-address) and undecremented ttl.

Impact

Return traffic could use the wrong vlan

Conditions

fastl4 profile and asymetric routing on client side

Workaround

none

Fix Information

Use the nexthop VLAN for ePVA transformation for offloaded flow when available, instead of the incoming VLAN

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, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 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, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed versions: 12.1.0, 11.6.1

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.1.0, 11.6.1

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F5 - Defect ID: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

F5 - Defect ID: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

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: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

F5 - Defect ID: 551927

ePVA snoop header's transform vlan should be set properly under asymmetric routing condition

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