Bug ID 1238413: The BIG-IP might fail to update ARL entry for a host in a VLAN-group

Last Modified: Mar 30, 2024

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 17.0.0,,, 17.1.0,,,

Fixed In:
17.1.1, 16.1.4, 15.1.10

Opened: Feb 09, 2023

Severity: 3-Major


ARP requests through a transparent or translucent VLAN-group might fail. The command "tmsh show net arp" displays the VLAN as the VLAN-group rather than a child VLAN. This symptom might be intermittent.


ARP resolution failure.


- A transparent or translucent VLAN-group is configured. - ARP requests passing through the VLAN-group. - Higher gaps (approximately 9 hours) in layer 2 traffic seen by the BIG-IP from the target of the ARP request.


Create a monitor on the BIG-IP to monitor the target of the ARP resolution. This will ensure that layer 2 traffic is seen by the BIG-IP from that host, keeping the ARL entries current.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips