Bug ID 949721: QUIC does not send control frames in PTO packets

Last Modified: May 29, 2024

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

Known Affected Versions:
15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1

Fixed In:
16.1.0, 16.0.1.2, 15.1.4.1

Opened: Sep 29, 2020

Severity: 4-Minor

Symptoms

When the QUIC PTO timer fires, it may resend some in-flight data. That data will not include any in-flight control frames.

Impact

Minimal. The PTO timer is a mechanism to 'get ahead' of any lost packets and if a packet containing control frames is lost, those frames will be retransmitted.

Conditions

A control frame is in-flight when the PTO timer fires.

Workaround

None.

Fix Information

Retransmittable control frames are now sent when the PTO timer fires.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips