Upgrade to RouterOS to last version
Update firmware to last version System->Routerboard->Upgrade
Reboot
Switch to SwOS
Upgrade to last version
Use it with no flapping
ok, you can also buy another vendor switch, but I don’t think that it was the question…
Hey Mikrotik guys, where are you?
This is user forum. Support replies in some topics occasionally, but there’s not guarantee they reply to your particular message. If you are looking for an official reply you should contact support@ and/or you supplier/distributor directly.
I think that after one year and an half, many support request, some device repair, some device went in the bin, and a lot of devices with the same problem, mikrotik guys could pubblicaly response and give us an idea if they want to continue seriusly making routerOs switches or not.
Very funny - for you MikroTik = RouterOS ??!?
Guy ask for solution, I gave to him one - it’s not universal, but if he need basic switch capabilities it work.
onestly, yes.
Using Switch OS is not a solution. Its possibly a bandaid, I don’t want to be pushing 10G of data hoping that works. Need a reliable fix.
I’m also having some severe port flapping issues with a bonded 20G (2 DAC SFP Plus cables) between a CRS328 and a CRS317 switch.
Need to use RouterOS on both because I would really like to have OSPF running on both switches. (i am aware of the routing performance of these switches, no need to comment on this).
So, switching to SWOS is not an option for me.
Need a reliable fix for this as well.
Mail support at Mikrotik with the support files for both switches. They will probably tell you that the CRS317 needs a repair. In that case prepare for a long wait: it took them 4 months in my case if I remember correctly… My switches now link perfectly fine: the link has been up since Dec 18: more than 5 months
I’m observing the same flapping issue
I hae noted that temperature is quite high and FAN are at 0 RPM. Checking with snmp the fan are switched some time.
but not enough to cool down the CRS317 with 5 SFP+ installed. the SFP module temperature are between 55 and 60 °C and they start to flap when reach 55 … and they are mikrotik too …
question I noted from command line I can set fan trhreshould but noted that nothing change.
Mikoritk manual does not explain the commands so I’m quite trying to set some valut but would be good to get some advice.
thank you
I have the port flapping problem with my recently purchased CRS328-24P-4S+. The switch has 3 10Gig links plugged in to it. Two of them are 1m dac connections and work fine.
The 3rd connection is a lc multimode fiber connection that is 21.5m in length (1.5m patch, 5m patch, and 15m mm fiber between locations). This fiber connection drops every few minutes and immediately reconnects. Also, I can make it drop the connection just by asking SWoS 3.11 to do a backup. The other two connections don’t drop periodically, or exhibit this behavior when asking for a backup… they’re reliable. It’s only the mutimode fiber that has the problems.
For the connection that doesn’t work, I’ve proved that the switch is the problem by using the fiber link to directly connect two computers. I’m even using the same transceivers. When I do that, everything works perfectly (and in fact that was how the customer had originally setup their network… just a single 10gig fiber connection between the two computers).
…very frustrated…
Same problem on config:
- CRS317
- CRS328
- DAC SFP+
http://forum.mikrotik.com/t/port-flapping-on-crs317-1g-16s-with-s-da0003/142642/5
Mikrotik why you provide BROKEN hardware?
You have to change switch port until you find the correct sequence that not flap.. good luck!
Mk switch @10gbps are not reliable at the moment
Hello. I read this post and checked my fiber pop.
CCR1009
CRS317 where are connected (all via 10G SFP cables), CRS328.
on ten switch, one has sfpplus1 flapping as described.
I will try changing the DAC then I will RMA the switch.
lastest long-term on it.
I have made further investigations.
I have 10 CRS328 connected to a CRS317.
the only CRS328 that have issues are:
5 CRS with 5mt MT DAC, with 5mt MM fibers.
a lot of CRS errors
two of them flaps, the other 4 dont flap.
I tried to fix everyone of them at 1G to see if it flaps again or give me errors.
I see a lot of FCS errors, it seems that the cable is bad… it is possibile 5 5mt MT cables are all faulty?
The other CRS are connected via a mix of 1MT / 3MT DAC from MT with 0 flaps and 0 errors.
Quick Question : If I try to switch to SWOs to reduce port flapping, How will I know if it’s solved? Is there a log event for port down as in RouterOS?
You can check the logs on the CRS328 side.
I’m also having port flapping problems on my CRS317 and 4 units of CRS328 pairs. Right now I have the CRS328 connected to a CRS354, no flap yet, almost 12hrs.
Seems the problem is at CRS317.
CRS326-24G-2S+ 85 degrees steady temperature
SFP+ 10G optical 60 degrees steady
Rack temperature 24 degrees steady
Cpu usage 1-3%
Can´t begin to imagine where temperature will go if cpu usage gets higher
I upgraded the switch with the latest long-term and it no longer flaps!
Finger crossed… 12h without a single flap 
Update, just 1 switch in 4, resumed port flap
the other went flawlessy