Hi,
I'm on 6.48 stable, RB4011/revision2. This router is excellent and fast. Previously I had gr3/hex that was maxing out with latest firmware @870mbps (a lot of txpauses or drops) ... so I''ve upgraded (there should be info on benchmark page with latest firmware and/or factory one... as performance is dropping between FW releases - which is understandable).
The only one interesting issue I've found is that even if its maxed out at 20% cpu usage... I've found that in Tx stats of the eth1/wan portI get Tx Pauses - and interesting correlation is that it happens almost at same rate as Tx&Rx 64 size frames.
Yesterday it was 64 vs 63 TxPause
today its
81 vs 80...
Its almost nothing.. i know but it might be indicative of some bug.