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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 this error means and how I can resolve it to change my MTU?
16 Replies
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- Despite StephenB attempt to clarify, I'm pretty sure there is still an issue with the measuring unit.
Speedtest gives the speed in Mbps, not in MBps... Unless you specifically ask it to use Bytes, and then I believe it gives KBps, not MBps.
170Mbps / 20Mbps is a good but common Internet connection. Usual on cable connection.
170MBps / 20MBps is a very very good Internet connection, not very common. Usually (real) fiber connection. And you wouldn't even be able to see the benefit of it (from a single machine) without a 10Gbps connection to both the Internet ONT and your machine. Also I doubt you'd be using an RN104 if you had a 10Gbps capable switch.
8MBps up is weird though. 8MBps out of a 20MBps connection wouldn't be that bad, but could happen. 8MBps out of a 20Mbps connection is not possible, unless calculation error.
How are you measuring the transfer speed from NAS?
Could you share screenshots of your tests?
omicron_persei8 wrote:
Despite StephenB attempt to clarify, I'm pretty sure there is still an issue with the measuring unit.I understood him to say that his internet connection is nominally 150/15 mbits, and that he measures 170/20 mbits with speedtest.net.
Also that his NAS speed measurement is 8 megabytes per second.
omicron_persei8 wrote:
8MBps out of a 20Mbps connection is not possible, unless calculation error.
That's why I asked about the direction (uploading to the NAS, or downloading from the NAS).
omicron_persei8 wrote:
How are you measuring the transfer speed from NAS?
Could you share screenshots of your tests?
It's useful to know these in addition to the questions I asked above.I was really hoping this discussion wasn't going to devolve into a debate about speeds, throughput measurement or the like. All I'm trying to do is change my MTU to troubleshoot poor WAN throughput on the ReadyNAS 104.
My connection is rated at 150 / 15. I consistently download at 130 - 150 without issues using my desktop or laptop. My ReadyNAS 104 is capping out at a maximum of 64 down, even though I can saturate the connection at over 700 Mbps on a LAN transfer. I've tried a variety of testing methods, (git, ftp, newsgroup with and without SSL) and 64 is the maximum I can hit, 40 being the typical average.
I have an error message being provided by the ReadyNAS with an associated error code, so you would think there should be a way to reference the error code to address the problem.
CigarSurgeon wrote:
I was really hoping this discussion wasn't going to devolve into a debate about speeds, throughput measurement or the like. All I'm trying to do is change my MTU to troubleshoot poor WAN throughput on the ReadyNAS 104.
I'm trying to keep it out of there, but sometimes the details matter.
Based on your last post, you are using SSH to log into the NAS, and you are running some speed tests there. And that you aren't doing remote access, instead you are running several applications protocols using TCP from the NAS command line - ftp, git, and nntp. Is that correct?
The laptop and desktop are using 1500 for their MTU correct? So it seems unlikely to be an MTU issue. Did you probe the MTU of your far-end test sites from a PC with Ping? You can of course temporarily change the NAS MTU using ifconfig, you don't need to use the GUI.
CigarSurgeon wrote:
I have an error message being provided by the ReadyNAS with an associated error code, so you would think there should be a way to reference the error code to address the problem.
The error code is when you try to change the MTU. That might not be your performance problem. I can't track that down anyway, since I don't work for Netgear.
- 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>
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.
I believe there was an issue with changing MTU on the 6.4.x firmwares. Can't remember exactly what version that was.
Can you try and update to the latest firmware please and test again?
Thanks
> Can you try and update to the latest firmware please and test again?
Typo as I was trying to get out the door this morning. I'm running the lastest release OS 6.5.1.
Might be GUI or NIC config related then.
Try to maybe:
1. Reboot the NAS.
2. Try different browsers (clear cache, etc).
3. You could try an OS re-install as well, from the boot menu. That resets NIC settings so maybe it could help if the config somehow is borked. This will also reset your admin PW though - back to "password".
Thanks
I am not seeing this on my RN102 (which is running 6.5.2-T486).
Is your performance issue on your local lan? If so, wired or wifi?
> Is your performance issue on your local lan? If so, wired or wifi?
Performance issue is WAN related, LAN speeds are fine. Wired, always wired. :)
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