Changes in version 2.5 Polar Bear:

The bug in flow end time while forming full netflow was fixed.

Configuration parameters active and inactive timeout were added to help forming full netflow.

The information on stand-alone ASN systems was updated.

Update manual

To check the currently installed version:

yum info fastdpi

Do not update Linux kernel to the latest version kernel-2.6.32-431.29.2 or above. This kernel is not binary compatible with Kernel ABI. The network driver can not be loaded after this update. In case you made this update - please configure grab loader to load the previous version while solving the problem1) Set the parameter default=1 in the file /etc/grub.conf .

Check what's new in previous version.