Bug ID 1292793: FIX protocol late binding flows that are not PVA accelerated may fail

Last Modified: Mar 30, 2024

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

Known Affected Versions:, 15.1.9,,,,,,

Fixed In:
17.1.1, 16.1.4, 15.1.10

Opened: Apr 25, 2023

Severity: 3-Major


FastL4 connections with late binding enabled typically used for FIX protocol can stall or hang if they are evicted from PVA and not re-offloaded.


Connection may stall.


- Late binding enabled on a FastL4 flow. The flow is not accelerated, and if the flow recieves approximately 50 packets, then it will hang. Captures would show packets ingressing to the BIG-IP and not being forwarded to the peer.


Disable late binding. If late binding cannot be disabled, then disable pva-flow-aging and pva-flow-evict to avoid the issue.

Fix Information

FIX protocol flow works as expected.

Behavior Change

Guides & references

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