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Forum Discussion
Can't shutdown Ready NAS rn104 with 6.1.4 RC3
Hello I have a VERY irritating problem. Everything time I turn off my NAS unit it just starts up again. After 3-4 sec. I have disk sleep turned off and auto standby schedule off. Anyone?????? Now I...
I found the sollution myself!!!!
It was the addon VPN 1.5.0 that caused the change of MTU every system shutdown. As soon as i uninstalled it everything worked flawlessy again!!!!!
The issue identified by the support case will only occur if you have actively changed the MTU from 1500 to 9000. If you haven't changed the MTU, then your case is different to mine. Go to "Network" and have a look at your MTU. If it's 1500 and your box doesn't stay shutdown, it is a new issue. If it is above 1500, change it back to 1500 by clicking on the cog and reboot and see if a shutdown stays shutdown.
The below is a screenshot of my working legacy Ultra6 with jumbo frames (for illustration purposes), which works fine. My RN102 doesn't work with WoL and Jumbo frames and has an MTU of 1500.
Hello again
Mine was set to 1985.....instead of 1500.
Now everythings working with system shutdown again. What am I loosing here. Any performance loss from going from 1985 to 1500????
1985 is a very strange value. It certainly should not have been set to that.
"MTU" stands for "maximum transmission unit". The value should be matched to the maximum packet size your network (e.g. your switch and router) can carry (taking into account the max packet size your PC NIC cards can receive). There are ways to test this - the most common is to use a utility called ping. If you google MTU and ping you'll find several guides.
The standard value for ethernet is 1500 bytes, and that is the NAS default.
9000 bytes is common for jumbo frmes, though some laptops in particular need smaller values. Sometimes enabling jumbo frames will improve performance, but in other cases it will actually hurt performance.
The reason it is inconsistent is that jumbo frames don't change the raw speed of your network. What they do is reduce the packet rate (larger packets mean that you send fewer of them). For some devices that reduces the CPU usage, but that is not always the case.
FWIW I use 1500 for my NAS.
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