Regarding the original question: That's probably the 32bit rollover (approx. 4GB). SwOS 2.8 uses 64bit coutners.I have updated the SwOS of my CSS326-24G-2S+RM switch to SwOS 2.6 and the stats tab gives incorrect values. It seams that the TX bytes and RX bytes are frequently reset to zero. Is this a bug or a feature?