Bug ID 476524: SSL handshake delay when SSL mirroring enabled or mirrored connection fails to recover after failover.

Last Modified: Oct 16, 2023

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

Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed In:
13.0.0

Opened: Aug 22, 2014

Severity: 3-Major

Related Article: K85840636

Symptoms

SSL handshake delay when SSL mirroring enabled, or mirrored connection fails to recover after failover.

Impact

- SSL handshake delayed for 80% of SSL handshake timeout. - Mirrored connection fails to recover after failover. - In rare situations the SSL handshake might be delayed after the ClientHello is transmitted or a mirrored connection may fail to recover after failover.

Conditions

Mirroring enabled on TCP virtual server.

Workaround

Set connection.syncookies.threshold (or, in the GUI, SYN Check Activation Threshold) to 0 and enable hardware syncookies in the TCP profile.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips