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Forum Discussion
high tcp segments resent
Hi. When I try to stream any movie larger than 1gb from my readynas duo v2 it repeatedly freezes throughout the whole movie with a couple minutes in between freezes. I have read lots of posts ab...
Segments get retransmitted because packets get lost. Queue overflow is one possibility, but there are others.
Note that the queues in the router are normally empty unless the router is downspeeding the connection.
Some causes of packet loss:
(a) bad cables. This includes cat-5 for gigabit ethernet (instead of cat 5e)
(b) failing switch ports (could be in the NAS, the far end device, or any intermediate router/switch
(c) WiFi interference (if the far end device is connected over WiFi
(d) gigabit->100 mbit ethernet downspeeding in the absence of ethernet flow control.
The TCP settings could potentially be adjusted in the far end PC, though I am not understanding why you think changing those settings would help. I think the cause is more likely physical layer, and that the solution probably lies there as well.
Can you tell us more about your home network setup?
Note that the queues in the router are normally empty unless the router is downspeeding the connection.
Some causes of packet loss:
(a) bad cables. This includes cat-5 for gigabit ethernet (instead of cat 5e)
(b) failing switch ports (could be in the NAS, the far end device, or any intermediate router/switch
(c) WiFi interference (if the far end device is connected over WiFi
(d) gigabit->100 mbit ethernet downspeeding in the absence of ethernet flow control.
The TCP settings could potentially be adjusted in the far end PC, though I am not understanding why you think changing those settings would help. I think the cause is more likely physical layer, and that the solution probably lies there as well.
Can you tell us more about your home network setup?
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