Bug ID 716952: With TCP Nagle enabled, SSL filter will hold the HUDCTL_REQUEST_DONE/HUDCTL_RESPONSE_DONE message until the last data packet offload process complete.

Last Modified: Apr 22, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: Apr 25, 2018
Severity: 3-Major


When TCP Nagle enabled, the data sent from server is handled by the SSL filter to offload data processing. The SSL filter forwards the HUDCTL_REQUEST_DONE/HUDCTL_RESPONSE_DONE message to TCP4 filter. Because Nagle is enabled, this leaves the last offloaded packet 'stuck' in the TCP4 filter.


The last data packet waits until all other packets have been ACKd.


-- Nagle is enabled. -- SSL filter is in the chain.



Fix Information

SSL filter now holds the HUDCTL_REQUEST_DONE/HUDCTL_RESPONSE_DONE message if an offloaded data packet is still in progress.

Behavior Change