BugZero | F5 BugID 1589629 - An ICMPv6 Neighbor Solicitation sent to the last a...

F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

Last updated on July 28th, 2026

BugZero Risk Score
6.8 Medium

Overall: 6.8

Severity: 7.3

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 3-Major
Status: Not Verified
Impact Category: Local Traffic Manager

Description

Symptoms

The destination MAC address of the ICMPv6 Neighbor Solicitation message is incorrect.

Impact

Nodes on the network do not respond to ICMPv6 Neighbor Solicitation messages. In large environments with many affected addresses, this could potentially contribute to a broadcast storm or degrade overall network performance.

Conditions

An IPv6 SelfIP address is used, and tmm attempts to resolve the address of (for example) an IPv6 pool memeber which is using the last IPv6 address in the available subnet range.

Workaround

None (other than avoiding the use of the last address in the IPv6 subnet range)

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 15.1.10.8, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 16.1.6.1, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.1.3.2

Fixed versions: 17.5.1.8, 17.1.3.4

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 17.5.1.8, 17.1.3.4

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F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

F5 - Defect ID: 1589629

An ICMPv6 Neighbor Solicitation sent to the last address on an IPv6 subnet uses the wrong Destination MAC address

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.8 Medium

BugZero Risk Score
6.8 Medium