Bug ID 1934005: Infrequent and uneven traffic to front panel LAGs can lead to premature aging of L2 events

Last Modified: Jul 30, 2025

Affected Product(s):
F5OS Velos(all modules)

Known Affected Versions:
F5OS-A 1.8.0

Opened: May 02, 2025

Severity: 3-Major

Symptoms

For front panel LAGs on rSeries which span FPGAs (1.0/11.0, 2.0/12.0, etc) infrequent traffic which is not evenly distributed across the LAG members can lead to premature aging of L2 entries.

Impact

Missing L2 entries can cause excessive DLFs until the MAC address is re-learned.

Conditions

- r10000 or r12000-series appliance - LAG members spanning FPGAs and minimal incoming traffic on the LAG can cause premature aging of L2 entries when the traffic isn't evenly distributed among LAG members.

Workaround

Re-configure the LAG members such that they connect to the same FPGA (1.0/2.0, 11.0/12.0). Interfaces 1.0 through 10.0 are on one FPGA, and interfaces 11.0 through 20.0 are on the other FPGA.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips