Bug ID 1824097: ARP is disabled in the virtual server listener when a DOS profile is configured via the Protected Object page

Last Modified: Jun 19, 2025

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

Known Affected Versions:
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, 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

Opened: Feb 23, 2025

Severity: 3-Major

Symptoms

After assigning a transparent DOS profile to a virtual server, the virtual server may suddenly stop processing traffic and will not respond to ARPs.

Impact

The virtual server stops accepting traffic (no route to host) due to ARP disabled

Conditions

The DOS profile is applied via Security >> DoS Protection >> Protected Object

Workaround

Manually enable ARP(and icmp-echo) on the virtual-address: #tmsh modify ltm virtual-address <ip address> arp enabled (icmp-echo enabled)

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips