Originally Posted by ThunderBulldog
I found gigabit NAS connected to gigabit switches have serious playback problems streaming DVD file structure movies to 100mb video players hooked to the same switch. The video keeps freezing alot like all the equipment is stuck negotiating speed on the switch. Connect everything to a 100mb switch & everything works. Any ideas why?
It is because of the rate mismatch (10:1) , the data packets destined for the 100mbit port have to be buffered as the data is coming in faster than it can exit the switch, if the NAS decides to send a burst of data it can overflow this buffer and the switch starts to drop packets and the video freezes. The fix is to get a switch with more buffer memory per port and the ability to exert flow control on the GigE ports to halt the feed from the NAS.
Unfortunately these are features found in highend managed switches which costs 3-4x and up compared to the retail unmanaged switches.