As mentionned here I experienced a very severe network issue with my Dreambox 7020. Transferring movies between the DBox and my PC was simply unbearable. I saw lots of posts instructing to replace a capacitor on the mainboad but I found that too hard to do. I solved the issue a different (and easier) way. Turns out that if you connect the Dreambox to a Gigabyte switch, the switch to another Gigabyte switch and finally your PC to the switch, the network speed goes back to normal.
So I did the following :
Dreambox –> D-Link Gigabit Switch DSG-1008B –> Netgear Switch GS-116 <– My PC
…and it’s working… very strange isn’t it ?