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Forum Discussion
JayNZ
Nov 06, 2012Aspirant
SMB/Win7 Video Lag/Stutter (NV+ V2)
Hoping someone can give me a simple answer to this problem. I have just put in a ReadyNAS (primarily as media storage) and I am experiencing very poor HD Video playback when trying to access this f...
StephenB
Nov 06, 2012Guru - Experienced User
As you probably know, the 10-12 MB/second speeds you are seeing now are limited by your 100 mbit NiC connection.
It sounds like you have a mixed gigabit / 100mbit network (with the network core all gigabit, but at least some edge devices 100 mbit).
One possible cause is that the ReadyNAS is over-running the switch buffering - as it can deliver data to the switch much faster the switch can deliver it over the 100 mbit link to the PC. So I think it might be useful to install a gigabit NIC in that PC sooner rather than later. One pretty definitive test would be to set the NAS to run at 100 mbit, and see if the performance on the PC improves. (That would be just a test, not a solution).
If it is caused by buffer overrun, you should probably turn on 802.3x flow control in the PC NIC (assuming it is off), as that might help minimize the buffering requirements in the switch. There might be some TCP settings you could also tweak in the PC that could help. However,if downspeeding the ReadyNAS fixes the stuttering I think I would simply replace the PC NIC.
BTW, are you using the WNDR3700 as a router or as an access point/switch. It probably should be in AP mode (if I understand your topology correctly).
It sounds like you have a mixed gigabit / 100mbit network (with the network core all gigabit, but at least some edge devices 100 mbit).
One possible cause is that the ReadyNAS is over-running the switch buffering - as it can deliver data to the switch much faster the switch can deliver it over the 100 mbit link to the PC. So I think it might be useful to install a gigabit NIC in that PC sooner rather than later. One pretty definitive test would be to set the NAS to run at 100 mbit, and see if the performance on the PC improves. (That would be just a test, not a solution).
If it is caused by buffer overrun, you should probably turn on 802.3x flow control in the PC NIC (assuming it is off), as that might help minimize the buffering requirements in the switch. There might be some TCP settings you could also tweak in the PC that could help. However,if downspeeding the ReadyNAS fixes the stuttering I think I would simply replace the PC NIC.
BTW, are you using the WNDR3700 as a router or as an access point/switch. It probably should be in AP mode (if I understand your topology correctly).
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