Bug ID 476564: ePVA FIX: no RST for an unaccelerated flow targeting a network virtual

Last Modified: Apr 28, 2025

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

Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8

Fixed In:
12.0.0, 11.6.1, 11.5.2, 11.4.1 HF6

Opened: Aug 22, 2014

Severity: 3-Major

Related Article: K16884

Symptoms

A network virtual server configured with guaranteed acceleration fails to receive a RST for a flow that is not accelerated. They see a RST when targeting a host virtual. This results in the client sending packet retransmissions continuously, since the client has no indication that the connection was closed.

Impact

The system drops flows.

Conditions

This occurs with guaranteed latency.

Workaround

None

Fix Information

The system now sends RST in guaranteed mode for an ePVA flow when the packet is received in software.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips