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rmaDK
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 16, 2019 9:16 am

Yesterday connected the new one CRS317-1G-16S+
On it, not one flap happened.
On old one also connected to same CRS328-24P-4S+ for this time 88 times.

And also noticed a strange thing.
Interface status, last link up / down shows a strange time.
The system time is correct, and in the status is wrong/strange time.
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michaels
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 16, 2019 1:02 pm

Yesterday connected the new one CRS317-1G-16S+
On it, not one flap happened.
So it could really be a hardware problem :(
And also noticed a strange thing.
Interface status, last link up / down shows a strange time.
time is not right for me either. strange bug...
 
angriukas
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 16, 2019 2:23 pm

I think
CRS326-24G-2S+RM
and
CRS125-24G-1S
contains same problem.
SFP+ port in 1G mode - no problems.
SFP+ port in 10G mode - problematic case even with Mikrotik DAC's.

Update:
problems raised when connecting two identical CRS326-24G-2S+RM devices with 10G DAC cable on SFP+ port.
Not all of devices was affected in my case. Totally installed 4 devices, two of them are problematic (from more early batch).
Last edited by angriukas on Tue Jul 16, 2019 8:13 pm, edited 1 time in total.
 
llag
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 16, 2019 5:23 pm

Our investigation has revealed that there might be a SFP+ compatibility issue with specific CRS317-1G-16S+ units when connected to other CRS3xx devices resulting in random link downs. Please, contact MikroTik support if you experience similar issue, we will verify it and arrange a repair if necessary.
@BECS: is there a way to identify if a CRS is affected? Does the serial numer tell if the device is affected?
 
pacman88
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Jul 29, 2019 2:34 pm

Is there any update on this?

can we buy mt hardware again or does this issue still persist?

BR
 
coelliale
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Jul 29, 2019 2:42 pm

as MK support said: "if possible, please, consider using CRS309-1G-8S+ as replacement in similar applications to decrease probability of encountering this issue."

:shock: :shock: :shock: :shock: :shock: :shock: :shock:
 
andersa
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Jul 29, 2019 4:42 pm

as MK support said: "if possible, please, consider using CRS309-1G-8S+ as replacement in similar applications to decrease probability of encountering this issue."

:shock: :shock: :shock: :shock: :shock: :shock: :shock:
If this is the case - it is simply not good enough. I have 30 of these devices in an installation, and -all- of them are experiencing this issue. It has almost been a year since i reported this to mikrotik support, and all i have got - despite several attempts at getting updated answers - is "we have recreated the issue".
 
Elliot
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Jul 29, 2019 9:07 pm

To all posters here,
i'm afraid that this is a combination of HW and SW problem when there's a SFP+ connection between CRS 317 and CRS 328 and simply put, don't expect that anything's gonna change anytime soon.

We've replaced CRS 328 with much more expensive Cisco devices and it works like a charm.

So my advice would be:
If you can replace one of the devices, DO IT!
If your network won't fully utilize 10G just go 1G and figure replacement later.
If you can't or don't want to replace a lot devices for an non-Mikrotik equivalent sell CRS 317 and buy CRS 309 instead.
 
nicoh
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Jul 29, 2019 11:56 pm

I have to say that it seems that there are either

a) just a few CRS317 affected
or/and
b) most buyers not aware of this issue
or/and
c) the amount of CRS317 <- 10G SFP+ -> CRS328 combinations are low

It seems that MikroTik accepts the risk to repair/replace a few CRS317 and continues selling a device which does not provide 10G connections to CRS328. I would go with a) or b) when comparing the stock levels over time of online shops to the amount of posts and active people in this thread.

Telling customers not to buy a product in order to reduce the probability of failure is another way to tell them to look for alternatives as Elliot did.
 
andersa
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 30, 2019 12:30 am

To all posters here,
i'm afraid that this is a combination of HW and SW problem when there's a SFP+ connection between CRS 317 and CRS 328 and simply put, don't expect that anything's gonna change anytime soon.

We've replaced CRS 328 with much more expensive Cisco devices and it works like a charm.

So my advice would be:
If you can replace one of the devices, DO IT!
If your network won't fully utilize 10G just go 1G and figure replacement later.
If you can't or don't want to replace a lot devices for an non-Mikrotik equivalent sell CRS 317 and buy CRS 309 instead.
I can live with GE a while longer, and i'm sure there will be a replacement program at some point. I just wish MT would communicate a little more. What switches did you go for? Changing the poe switches would be a nightmare for us, but changing the crs328 would be less painful. You say you chose cisco, did you consider other options? If so, what were they?
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Jul 30, 2019 9:13 am

Let's add some advice:
  • use CRS317 with SwOS (no other ver than 3.7) instead of RouterOS
 
cmavced
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Jul 31, 2019 9:50 am

I think we have a similar problem.
I'm testing the two just arrived Microtik CRS 317-1G-16+ switches.

I have my computer connected on ETH 10/100/1000 management/data port and a 100mbs ethernet link connected throught a S-RJ01 SFP (listed in MicroTik compatibility list https://wiki.mikrotik.com/wiki/MikroTik ... lity_table ).
The connection is not stable and the ports seems to flap.

The problem occours with SwitchOS but not with RouterOS.
I've also tried the connection using two S-RJ01 SFP, one for my computer and one for the 100mbs link, but the problem is the same.
No problem if I use a 1000mbs ethernet link, either using S-RJ01 SFP or directly attached to ETH 10/100/1000 management/data port.

I have also done a third test:
I've connected the 100mbs ethernet link to the eth 10/100/1000 management/data port of the first switch, than I connected the two CRS317 with a Cisco 10Gbs DAC SFP+, and I connected my computer to the eth 10/100/1000 management/data port of the second switch (avoiding the use of S-RJ01 SFP). The problem is the same.
Also in this case, no problem if I use a 1000mbs ethernet link.

It seems a problem with MicroTik Switch OS software.

I'm using 2.9 SwitchOS version and 6.45.2 RouterOS.
 
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kosyot
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Jul 31, 2019 12:42 pm

Just use (mention above) SwOS 2.7 - 2.9 has a lot of bugs (see topic viewtopic.php?f=21&t=144031)
p.s. never use management port for traffic on switch
 
Elliot
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Jul 31, 2019 8:53 pm

To all posters here,
i'm afraid that this is a combination of HW and SW problem when there's a SFP+ connection between CRS 317 and CRS 328 and simply put, don't expect that anything's gonna change anytime soon.

We've replaced CRS 328 with much more expensive Cisco devices and it works like a charm.

So my advice would be:
If you can replace one of the devices, DO IT!
If your network won't fully utilize 10G just go 1G and figure replacement later.
If you can't or don't want to replace a lot devices for an non-Mikrotik equivalent sell CRS 317 and buy CRS 309 instead.
I can live with GE a while longer, and i'm sure there will be a replacement program at some point. I just wish MT would communicate a little more. What switches did you go for? Changing the poe switches would be a nightmare for us, but changing the crs328 would be less painful. You say you chose cisco, did you consider other options? If so, what were they?
We have our Mikrotik CRS 317 connected to couple of Cisco SF350-48P (48 port POE switch) via 10G SFP+. And another couple of NETGEAR GS752TXP connected via SPF+ too. In both cases no port flapping.
I might add that we haven't thrown out CRS328 but we run only 1G on uplink due to port flapping when running port in 10G. It's pretty sad because otherwise it would be great value solution when you have one or two core CRS 317 switches connected to multiple site with CRS328.
 
llag
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Aug 01, 2019 12:44 am

I have to say that it seems that there are either

a) just a few CRS317 affected
or/and
b) most buyers not aware of this issue
or/and
c) the amount of CRS317 <- 10G SFP+ -> CRS328 combinations are low

It seems that MikroTik accepts the risk to repair/replace a few CRS317 and continues selling a device which does not provide 10G connections to CRS328. I would go with a) or b) when comparing the stock levels over time of online shops to the amount of posts and active people in this thread.

Telling customers not to buy a product in order to reduce the probability of failure is another way to tell them to look for alternatives as Elliot did.
Well I reported my issues to support and now will have to return the CRS317 for RMA. I can only hope that that will solve my issues. It remains a mystery that this apparently happens only between the CRS317 and CRS328. It still sounds as if the issue is partly caused by the CRS328 as well, otherwise it should occur between the CRS317 and other switches and/or 10G network cards....
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 06, 2019 11:30 am

We are having massive issues with this. We have replaced the switch reset the config and its still shocking. Its 100% the CRS328's not the CRS317's

We have also changed the optics i dont know how many times tried DAC's its still awful.

see the picture this is less than 24hours up-time!
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http://www.countybroadband.net
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Provider of wireless broadband in Essex and Suffolk UK
 
nmt1900
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 06, 2019 5:19 pm

Its 100% the CRS328's not the CRS317's
My experience tells otherwise - links between 317 and 326 are flapping, but when link from one 317 is connected to other 326, then flapping travels along with "sick" 317.

I don't know about 328-24P-4S+, but 326 seems to have similar hardware (counting out PoE and amount of sfp+ ports) hence problems might be of similar nature.
 
llag
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Fri Aug 09, 2019 12:33 am

Its 100% the CRS328's not the CRS317's
My experience tells otherwise - links between 317 and 326 are flapping, but when link from one 317 is connected to other 326, then flapping travels along with "sick" 317.

I don't know about 328-24P-4S+, but 326 seems to have similar hardware (counting out PoE and amount of sfp+ ports) hence problems might be of similar nature.
I raised a case with support and they told me to RMA the CRS317. We will see what will happen when I get the CRS317 (or a replacement) back....
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Fri Aug 09, 2019 2:16 am

Some can see the post, no port flapping, but other problems,

viewtopic.php?f=2&t=150971

Thanks!
Cesar Javier Robles
www.WindNet.com.ar
MTCNA - MTCTCE - MTCRE - MTCWE
 
llag
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Aug 14, 2019 3:19 pm

Its 100% the CRS328's not the CRS317's
My experience tells otherwise - links between 317 and 326 are flapping, but when link from one 317 is connected to other 326, then flapping travels along with "sick" 317.

I don't know about 328-24P-4S+, but 326 seems to have similar hardware (counting out PoE and amount of sfp+ ports) hence problems might be of similar nature.
I raised a case with support and they told me to RMA the CRS317. We will see what will happen when I get the CRS317 (or a replacement) back....
I RMAd the device and the problem got acknowledged. The switch now has to be sent to Mikrotik for repair, which will take 6-8 weeks. That is a loooong time.
I was told that replacing it will not solve the issue as even new models have the problem.

Does this mean that Mikrotik knowingly continues to sell a faulty product?
 
nicoh
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Aug 14, 2019 3:26 pm

Does this mean that Mikrotik knowingly continues to sell a faulty product?
According to the findings within this thread and the information I received from our distributor: Yes.
 
sebg
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Aug 14, 2019 4:00 pm

Does this mean that Mikrotik knowingly continues to sell a faulty product?
According to the findings within this thread and the information I received from our distributor: Yes.
So almost one year after, we're at the same place....

We've bought high-end devices from Mikrotik, hoping for full 10G support : Mikrotik Support ignores the sheer volume of testing done in this thread, reaching the conclusion that crs317 are the core issue :-(

They should at least acknowledge the issue, recall crs317 from customers wishing to upgrade to CRS326-24S+2Q+RM for instance, and offer competitive pricing to compensate for the inconvenience of months without basic core fonctionality (10G support)
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Aug 15, 2019 12:41 pm

So, we just bought a faulty device too, I see! We got a second piece of CRS317-1G-16S+ and the interconnection between the two of them has exactly the problems discussed here - port flapping and packet loss. It seems to be much better when connecting the two devices on higher ports rather than on the lower ports, but still there is some small packet loss at 10Gb. Fortunately, we do not really need to have the two devices interconnected at a high speed at the moment (just for management), but this is a disappointment and if there was an alternative at the same price level, I would immediately return the device and buy something else. I do not like to work with unreliable hardware at all. Good to know we should be more careful when buying MikroTik next time. :-(

Fortunately, everything seems to work well on connections to the servers and even on the connection to the CCR1036-8G-2S+, which is the important factor at the moment.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Sun Aug 18, 2019 3:47 pm

Exact same problem here, but it is between any CRS317-1G-16S+. Have confirmed its present on ALL links between CRS317's, but not any link to any other device or switch.

Initially I thought it was a cable fault, but we've changed cables, SFPs, etc. Same result. Once I found this thread we've come to realise its yet another example of a product flaw with no real information from the vendor and no solution in sight.

Unfortunately for us, this was the final straw. We've just placed a order for a whole batch of Cisco kit and all of our Mikrotik gear will be coming out once it arrives. Now officially a dissapointed ex-Mikrotik user but looking forward to dealing with reliable products and actual engagement from the vendor when things aren't right with their product.
 
emunt6
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 8:41 pm

Hi!

I just found this topic.

Did you use the Mikrotik switch through an UPS(uninterruptible power supply - pure sinus-wave type) hardware ?
If not, then this maybe a main problem - the power supply might have receiving some OVP/UVP/NOISE effects - causing the port flapping.
Last edited by emunt6 on Tue Aug 20, 2019 8:45 pm, edited 1 time in total.
 
andersa
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 8:44 pm

Hi!

I just found this topic.

Did you use the Mikrotik switch through an UPS(uninterruptible power supply - sinus wave type) hardware ?
If not, then this maybe a main problem - the power supply might have receiving some OVP/OCP/SCP effects - causing the port flapping.
In my case - yes, they were on a UPS.
 
andersa
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 8:47 pm

Hi people! Looks like MT is finally stepping up. I got this email from them today.

We got the Supout.rif from CRS317 that you just sent, looks like we didn't receive couple of emails that you sent previously (sic). But yeah, from Supout.rif we can see that CRS317 - 846C083E29E4 is indeed faulty and needs an hardware repair.

We have become aware of a small number of CRS317-1G-16S+RM devices that may exhibit sporadic port flapping issues in certain usage scenarios. Since we are unable to pinpoint exact devices which could potentially exhibit this issue, we do not recommend replacing the device with an identical model, instead, we recommend using CRS309-1G-8S+IN ( 8x SFP+ ports) and CRS312-4C+8XG-RM ( 4x SFP+/10G Ethernet combo ports and 8x 10G Ethernet ports) as temporary replacements, until you receive repaired units through our RMA procedure. Please contact the seller to submit the device for warranty repair.

You can submit Supout.rif's from any other affected CRS317's that you have and we will take a look at them and check if they need to be sent to RMA as well.


Any of you guys gotten the same?
 
emunt6
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 8:55 pm

Hi!

I just found this topic.

Did you use the Mikrotik switch through an UPS(uninterruptible power supply - sinus wave type) hardware ?
If not, then this maybe a main problem - the power supply might have receiving some OVP/OCP/SCP effects - causing the port flapping.
In my case - yes, they were on a UPS.
Hi!

I read in other topics/people, the power supply comes with the mikrotik switch - has not the best "quality".
I dont have any other idea what causing the port flapping.
 
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kosyot
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 9:32 pm

If the problem is on power supply there will be port flapping always, no matter what OS is running.
I have always port flapping when winning RouterOS (every single version on it) and never when running SwOS 2.7. We have a lot of 317 some connected to 326, 328 - different versions, all with SFP+ 10G running without single flap - all 317 running SwOS 2.7, other switches RouterOS or SwOS 2.9.
This is SOFTWARE problem, but I'm sure that MikroTik don't know how to resolve it - just see how many they need to produce new version on SwOS, because 2.9 is hell of the bugs.
 
andersa
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 10:12 pm

Hi!

I just found this topic.

Did you use the Mikrotik switch through an UPS(uninterruptible power supply - sinus wave type) hardware ?
If not, then this maybe a main problem - the power supply might have receiving some OVP/OCP/SCP effects - causing the port flapping.
In my case - yes, they were on a UPS.
Hi!

I read in other topics/people, the power supply comes with the mikrotik switch - has not the best "quality".
I dont have any other idea what causing the port flapping.
Can you elaberate on what quality parameters are not up to scratch? Also, the CRS317 has internal PSUs. Furthermore - as per my last post, they have admitted hardware faults in some CRS317.
 
emunt6
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 10:28 pm

If the problem is on power supply there will be port flapping always, no matter what OS is running.
I have always port flapping when winning RouterOS (every single version on it) and never when running SwOS 2.7. We have a lot of 317 some connected to 326, 328 - different versions, all with SFP+ 10G running without single flap - all 317 running SwOS 2.7, other switches RouterOS or SwOS 2.9.
This is SOFTWARE problem, but I'm sure that MikroTik don't know how to resolve it - just see how many they need to produce new version on SwOS, because 2.9 is hell of the bugs.
I heard a story, RouterBoard copper RJ45 ports had the same strange port flapping issue - they could not solve/trace the problem: software upgrade/config changes.
They tried as a last resort: After replacing the PSU the port flapping is gone.

I am not sure about that.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 10:43 pm

It's very normal to have issues on copper port, because of potential difference generated by two sides of the cable. On twisted pair technology this must be no problem at all, but very often it is indeed.
On the other hand optic ports have no such problem at all and power related problems are just fiction.
 
emunt6
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Aug 20, 2019 10:53 pm

Hi!

I just found this topic.

Did you use the Mikrotik switch through an UPS(uninterruptible power supply - sinus wave type) hardware ?
If not, then this maybe a main problem - the power supply might have receiving some OVP/OCP/SCP effects - causing the port flapping.
In my case - yes, they were on a UPS.
Hi!

I read in other topics/people, the power supply comes with the mikrotik switch - has not the best "quality".
I dont have any other idea what causing the port flapping.
Can you elaberate on what quality parameters are not up to scratch? Also, the CRS317 has internal PSUs. Furthermore - as per my last post, they have admitted hardware faults in some CRS317.
I'm not an expert about that.

But you can compare:
https://viva-telecom.org/13121/mikrotik ... rm/review/
https://viva-telecom.org/13024/mikrotik ... rm/review/
https://www.youtube.com/watch?v=KNDZZ5bD-wM

CSR317 have some "custom build" PSU: 2x "OF-WT2402500" in one cage.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Aug 26, 2019 9:57 pm

Since it sounds like its not an isolated issue (lol), I wont bother posting all my topology. However, We just deployed close to 10 317s, and are experiencing flapping on ONE of them. If that's useful to anyone. All 317 to 317 connections.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Aug 26, 2019 10:34 pm

Hi I have a CRS317-1G-16S+ and have had or trouble ticket open with Mikrotik support for months. I am wondering if anyone has had success getting their unit repaired or replaced and if so was the problem resolved with the new/repaired unit. In my case it works with 1Gb links. 10 GB links flap attached to any CRS switch. I have on 10GB link that is stable to a security video server.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Aug 26, 2019 10:43 pm

I am wondering if anyone has had success getting their unit repaired or replaced and if so was the problem resolved with the new/repaired unit.
I have one RMA'd with my supplier. On week 2 of the 4-6 week turn around...
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Wed Aug 28, 2019 6:38 pm

Has anyone tried the new CRS326-24S+2Q+RM Cloud Router Switch? I am wondering if it has the same port issues when connection at 10GB to other CRS3xx switches as the CRS317.
 
llag
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Aug 29, 2019 12:39 am

I am wondering if anyone has had success getting their unit repaired or replaced and if so was the problem resolved with the new/repaired unit.
I have one RMA'd with my supplier. On week 2 of the 4-6 week turn around...
My RMA (6 - 8 weeks) is only in the third week. I was told that a replacement would not make sense as new switches willhave the same problem.... So I am waiting for the repair while Mikrotik continues to selll defective equipment.
 
roggles
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Aug 29, 2019 8:43 am

Hello,

we have the new CRS326-24S-2Q+RM here and they worked 2 days without problems now.
I have connected this device to an CRS328-24P-4S through Mikrotik DAC Cables and multiple Mikrotik S+R10 r2.

We have also sent three of our CRS317-1G-16S+ back for RMA.

regards
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Aug 29, 2019 8:49 am

Has anyone tried the new CRS326-24S+2Q+RM Cloud Router Switch? I am wondering if it has the same port issues when connection at 10GB to other CRS3xx switches as the CRS317.
All the sources indicate that is only that specific combination that this topic is affected, and maybe even then only some part of CRS317 affected.
I have several CRS3xx connected to CRS317 no issues (with exception of some doggy DAC, that got replaced).
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pacman88
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Thu Sep 05, 2019 2:19 pm

we got 4 new crs317 as replacement (they have been tested at our supplier) but they show the same behaviour....

the recommended crs309 and 312 do not work as a replacement for us since we need the port density in that specific usecase. Has anyone given the new MikroTik CRS326-24S+2Q+RM a try?
in an other place I would consider the MikroTik CRS312-4C+8XG-RM but I got cautious with MT in general after those issues. Has anybody seen this issue occur on any other of the mentioned devices or only on 317?

BR
Alex
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Sat Sep 07, 2019 9:55 am

Has anyone given the new MikroTik CRS326-24S+2Q+RM a try?

Yes, got a CRS326-24S+2Q+RM yesterday (great device, many switch chip features).
Works great in conjunction with CRS328-4C-20S-4S+RM.
No more SFP+ 10G Port flapping (we have one CRS317-1G-16S+RM in RMA).
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Fri Sep 13, 2019 2:12 pm

Hi.
I also see problems with port flapping when using CRS317-1G-16S+RM <-> S+DA0001 <-> CRS326-24G-2S+RM.
CRS317-1G-16S+RM <-> SNR-SFP+LR-2 <-> CRS326-24G-2S+RM the problem is present.
All ports are switched to 1G now. But, on one port after turning on the RX / TX Flow Control option to auto, we observed RX Errors at first time. Yesterday i reset the error counter and so far no errors on this port with 10G. Keep watching
With CRS317-1G-16S+RM <-> S+DA0001 <-> RB4011iGS+RM everything is ok on 10G: no link downs, no rx errors.
 
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Fri Oct 11, 2019 11:53 am

Hi,

we can confirm that CRS328-24P-4S+ in combination with CRS312-4C+8XG show the exact same problematic port flapping behavior (RouterOS & FW v6.45.6) as the CRS317-1G-16S+. The exact testing scenario is:

- 2x CRS312-4C+8XG (both new)
- 2x CRS328-24P-4S+ (1 new, 1 used but "working as expected" from our supplier)
- The CRS328s are connected with SFP+ DACs to the CRS312 SFP+ combi ports
- The test scenario ran 9 days in an air-conditioned environment

The outcome is attached to this post. Some observations:
- Both CRS328 show just a few link downs (<20 Link Downs), there is no behavioral difference between the new and the used CRS328
- The CRS312s show different results 50 vs. 1129 Link Downs to the same CRS328
- The screenshot was taken on the Oct. 10th, the Last Link Down Time information do contain wrong information.

We also had two new CRS326 connected (via SFP+) to the CRS328 and CRS312 in question which did not show any port flappings during the testing period. This test is a consequence of the recommendations done by MikroTik to use the CRS312 and CRS326 as replacement for the flapping CRS317. In our tests we see that at least the CRS312 have the exact same issue as the CRS317s. There is still no evidence that the CRS328 is not part of the problem.

Conclusion:

- CRS312-4C+8XG combined with CRS328-24P-4S+ do have flapping SFP+ connections
- We did not receive any feedback from Mikrotik regarding this issue. Therefore, we will stop our tests of Mikrotiks problematic network devices.

br,
nicoh
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cbrown
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Mon Oct 14, 2019 6:22 pm

I can confirm this as well.
Hi,

we can confirm that CRS328-24P-4S+ in combination with CRS312-4C+8XG show the exact same problematic port flapping behavior (RouterOS & FW v6.45.6) as the CRS317-1G-16S+. The exact testing scenario is:

- 2x CRS312-4C+8XG (both new)
- 2x CRS328-24P-4S+ (1 new, 1 used but "working as expected" from our supplier)
- The CRS328s are connected with SFP+ DACs to the CRS312 SFP+ combi ports
- The test scenario ran 9 days in an air-conditioned environment

The outcome is attached to this post. Some observations:
- Both CRS328 show just a few link downs (<20 Link Downs), there is no behavioral difference between the new and the used CRS328
- The CRS312s show different results 50 vs. 1129 Link Downs to the same CRS328
- The screenshot was taken on the Oct. 10th, the Last Link Down Time information do contain wrong information.

We also had two new CRS326 connected (via SFP+) to the CRS328 and CRS312 in question which did not show any port flappings during the testing period. This test is a consequence of the recommendations done by MikroTik to use the CRS312 and CRS326 as replacement for the flapping CRS317. In our tests we see that at least the CRS312 have the exact same issue as the CRS317s. There is still no evidence that the CRS328 is not part of the problem.

Conclusion:

- CRS312-4C+8XG combined with CRS328-24P-4S+ do have flapping SFP+ connections
- We did not receive any feedback from Mikrotik regarding this issue. Therefore, we will stop our tests of Mikrotiks problematic network devices.

br,
nicoh
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Re: Severe port flapping on CRS328-24P-4S+ and CRS317-1G-16S+

Tue Oct 15, 2019 5:32 pm

Anyone tested the CRS326-24S+2Q+RM yet?

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