Bug ID 708266: IPv6 NDP with vlan-groups: unexpected Neighbor Advertisement and ICMPv6 unreachable messages

Last Modified: May 29, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: Feb 28, 2018

Severity: 3-Major


Stale NDP entries will generate an ICMPv6 Neighbor Advertisement (NA) if Neighbor Solicitations (NS) are received in rapid succession.


Unexpected NA informs about the reachability of the neighbor that in fact might be not reachable.


Neighbor entry being queried by the NS is in the probe state caused by the previous NS packet.


There is no workaround at this time.

Fix Information

Unexpected Neighbor Advertisement is no longer generated if Neighbor Solicitations are received in rapid succession.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips