Bug ID 1601949: Moving a self IP from one VLAN to another VLAN across L1 networks may cause self IP unreachable

Last Modified: Oct 19, 2025

Affected Product(s):
BIG_IP_NEXT(VE/HW) TMOS(all modules)

Known Affected Versions:
20.2.0, 20.2.1

Opened: Jun 27, 2024

Severity: 2-Critical

Symptoms

-- Ping to the self IP fails after assigning it to a different VLAN -- The Self IP address might not exist in the kernel

Impact

Traffic drop to the virtual servers/pools using the underlying self IP

Conditions

-- Two different L1 networks configured -- Two VLANs configured each on different L1 networks -- A Self IP is moved from one VLAN to another VLAN

Workaround

Remove VLAN/Self IP and re-add it

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips