Symptoms

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.

Impact

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

Conditions

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.

Workaround

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

None

Behavior Change