Bug ID 427924: ipport hash type is not programmed in new blade

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.6.1, 11.6.0, 11.5.3, 11.5.2, 11.5.1, 11.5.0, 11.4.1, 11.4.0, 11.3.0, 11.2.1, 11.2.0

Opened: Aug 14, 2013
Severity: 3-Major
Related AskF5 Article:


When inserting a new blade in a VIPRION C2400 chassis, with UDP or TCP hash set to 'ipport', the new blade uses the 'port' hash instead. Rebooting the blade or restarting bcm56xxd and tmm causes the correct DAG (Disaggregator) hash to be used.


Prevents adequate distribution of traffic within a chassis, which may disrupt traffic flows or reduce the traffic throughput of the BIG-IP system.


UDP or TCP hash algorithm changed from default (e.g. changed from 'port' to 'ipport'). -- UDP or TCP virtual servers configured. -- New blade inserted into chassis. New blade includes external interface to which traffic will arrive.


Reboot the new blade after it has been configured. Issue the 'bigstart restart' command (to restart the bcm56xxd and tmm modules and program the DAG with the correct hash type).

Fix Information


Behavior Change