This version is unstable on PC. 
After few days (two is maximum) the router stops respond without any information, only way how to get them online is reboot.
Router contains 8 wireless cards and one on board ethernet.
With previous version (5.7) router runs excelently all the time after instalation.
I downgraded the PC router to 5.7 :
There are a lot of posts here regarding this problem. 5.8 seems to be ok. 5.11 seems to be bad.
my x86 router lock up to, after upgrade from 5.8 to 5.9 and then unstable occured.
tried upgrade to 5.11 but wouldn’t help.
my conf :
webproxy internal, couples of mangling and queue tree, thats it.
with version 5.8 run flawlessly.
That is one of the bugs with 5.9, 5.10, 5.11. You have to use 5.8 with x86 for now.
i`m running 5.11 on x86 (core 2 duo, intel nics, multicpu=yes) for about 14 days, no problems…
Hi Alexspils. What is your ethernet controller model? I have some intel ethernet controllers. Have a problem of high latency if traffic exceeds 100Mbps.
Having reboot proplems on x86 with pppoe and bpg too… And no logs and somthing useful… Too bad…
Does anybody know any stable version? Could anybody tell: is it possible to downgrade? How?
Only x86 unit I have been having a problem on myself is my testing unit, it’s a Soekris net4501. Works fine most of the time. Only have has a couple random reboots, need reattach the serial cable and see if there are any messages on the console. Seems random though haven’t actually caught it yet. Only other strangeness I see is the unusual queuing CPU usage that I have seen go up to like 40%, I have no queues setup, tried setting up some to see if it made a difference and no real change.
Thank you for info… But, I think only developers can do something to help us…
I also have a lot of problems with my core router which is also multicore with 8 cores.
Since router OS 5.x is announced we have tried every of them but router is working maximum 20 days and then reboots by it self.
Interesting thing about rebooting is that it happens in time when traffic load is not on maximum values. Mostly it happens when the traffic is 50% and less of maximum traffic we have.
CPU is o.k. and there is no sign of any problem at the moment but router just reboots (this is better scenario) or it just hangs, no ping to it, we can not see it in ip neighbour and just turn off/turn on power is helping.
On v.5.7, 5.8 and 5.9 we had a problem with rebooting on every 1-2 days so now we are on 5.orc11 which is, by our experience most stable of all 5.x.
On this OS router works 15-20 day at the most before it chrashes and reboot.
I guess the crash is related to PPP or PCQ .
Since there are so many problems at 5.11
So I have been fortunate in 5.8
anyone with x86 problems in v5.11, send supout.rif file with your config to support
we have made a pre-release version with a potential fix for x86 reboots. please email us to get the beta
5.11 is very unstable in my configuration… 3-4 reboots at day
i install v5.8 to other new hardware (intel i3 s1155), 2 nics - Realtek 8111 Gigabit adapter…
and have a problem with this nics… at random time nics stop working and tx drop packets are very big increasing… only reboot fix problem…
this error occurs several times a day.
v4.17 don’t work on this system, NIC is defined but dont working, and ahve a message on screen about STOPING IRQ16
Wow! great news! Thank you very mutch! Could you please tell us: patch or new release?
5.12 released, use that. And it was pre-release you could try out.
upgrade my two routers-x86 (dual-core) from 5.7 to 5.12 - 3 days, all is right. Using bgp, queue-tree, mangles, nat, mpls, gre-tunnels - all works fine (at one router - 350-450 Mbit transfer, and 40-70 Mbit at other).
So far new version has been really stable on x86, have installed on be/le routers also with similar results so far. How has it been running on PPC, all core routers are 1100’s and don’t want to upgrade those until i know it’s stable. No spares of those to test with right now.