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Forum Discussion
Unable to change MTU, Readynas 104 OS6.4.1
I was attempting to adjust my MTU down from 1500 to 1472 or 1483 in order to troubleshoot network performance issues, and the UI rejected the changes with Error 4004019998. Does anyone know what ...
omicron_persei8 wrote:
You could try on a scratch disk (shutdown, remove your HDDs, insert tempirary HDD, factory default), to see if you have the same issue on a fresh installation.
While I understand this is an issue, I'm sure it would actually help you identify whatever network performance issue you're having. The value of the MTU on the NAS includes the header, that's why it's 1500, not 1472.
Did you try to ping the NAS with such packets? Something like: ping -f -l 1472 <ip_nas>
Actually I don't think the issue is the MTU on his LAN. He's thinking that the MTU on his WAN is smaller than 1500 (and if he is running pppoe that is certainly the case).
The right ping test is therefore to an internet server.
ping -f -l 1472 google.com
Find the largest size that works (1472 being the example size), and add 28. That value is what would be configured in the NAS (and possibly other equipment on the network).
Of course the NAS should be able to set the MTU, so that should be resolved even if the MTU size turns out to be the default 1500.
None of the above troubleshooting options have resolved the issue. I have 150/15 cable Internet and I'm unable to push the connection beyond 8 MB/s. LAN throughput is around 93 MB/s so I know it isn't my router infrastructure, cabling or the ReadyNAS itself.
15 megabits uplink would be slightly less than 2 MB/sec. Did you really mean 8 mbits? Or does the uplink speed have a typo?
Also, what speeds are you seeing with speedtest.net? Did you confirm those speeds with both on your home connection and the remote one?
> 15 megabits uplink would be slightly less than 2 MB/sec. Did you really mean 8 mbits? Or does the uplink speed have a typo?
150, not 15. It's 150 down, 15 up. And yes I was talking in MBs not Mbs with regards to download speeds.
> Also, what speeds are you seeing with speedtest.net?
170 / 20. Yes I can get those speeds on my desktop and laptop.
CigarSurgeon wrote:
> 15 megabits uplink would be slightly less than 2 MB/sec. Did you really mean 8 mbits? Or does the uplink speed have a typo?
150, not 15. It's 150 down, 15 up. And yes I was talking in MBs not Mbs with regards to download speeds.
Ok then. Your 8 MB/s measurement is when the remote PC is uploading to the NAS?
And how are you accessing the NAS remotely? ReadyCloud? FTP? OpenVPN?
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