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adminsg
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Performance Issues with CRS 312-4c+8xg

Mon Aug 26, 2019 11:43 am

Hello @all,

first of all best wishes at all from a new member in this forum.
As a fan of mikrotik products, i decided to install 3 crs 312-4c+8xg switches in our company, because our old 1G Switches weren't the best after a couple of years.
So i installed them in our network and our DELL R530 got an 10G Network Card (Dell (Intel) 10G X550-T RJ45 DUAL Ethernet Network CARD).
Now to my Problem:

If I transfer Files or make performance tests with iperf under Ubuntu theres a performance Issue with 1GBit Network Clients.
When i transfer Files from the Client to Server the speed corresponds to a 1G connection, but from server to Client i got a Max of 30M.
If i connect the same 1G Device direct to the server, then the connection is fast in both directions.

Maybe someone can help with this problem :)

thanks in advance

Steffen
 
marekm
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Re: Performance Issues with CRS 312-4c+8xg

Mon Aug 26, 2019 8:40 pm

Try to enable flow control on the 10Gb link - symptoms suggest the switch has a too small buffer so bursty traffic causes packet loss. With flow control, the switch can tell the server to slow down, effectively moving the queue from the switch (small buffer in the chip) to the server which has much more buffer space.
 
adminsg
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Re: Performance Issues with CRS 312-4c+8xg

Tue Aug 27, 2019 10:50 am

Thank you for your reply.
Flow Control was/is active, unfortunately this doesn't helps.
Maybe any other suggestions? :)
 
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macgaiver
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Re: Performance Issues with CRS 312-4c+8xg

Tue Aug 27, 2019 10:58 am

Sounds like you are not switching, but bridging instead So using that little CPU to push data. make sure you have hw=yes on all bridge ports, and all your VLAns are actually configured in bridge settings not as logical interfaces.
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marekm
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Re: Performance Issues with CRS 312-4c+8xg

Tue Aug 27, 2019 5:27 pm

CRS3xx devices are dual boot - is it running SwOS or RouterOS, and which version?
Is flow control really working? Check Tx/Rx pause frame counters in port statistics on both ends of the link.
Slow CPU would limit traffic in both directions, so I don't think this is the case here.
 
adminsg
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Re: Performance Issues with CRS 312-4c+8xg

Mon Sep 02, 2019 12:43 pm

Hello,

sorry for the long time since my last update.
I've tested a lot, but theres not really any progress.

The Switches running under Switch OS and i think flow control is working.
Tomorrow i make new tests with a Intel X520 sfp network card, then i also check the pause frames.
 
xqdong
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Re: Performance Issues with CRS 312-4c+8xg

Thu Feb 27, 2020 2:48 pm

Hi guys,

I met the same problem, gigabyte interface can only transfer at about 30Mb, have you found any solution to this problem, if you could share the root cause and solution, would be greatly appreciated.
 
02114
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Re: Performance Issues with CRS 312-4c+8xg

Sat Feb 29, 2020 4:39 pm

I have same question.
PC TO NAS SPEED
1G -------10G 40-60M
10G------10G 300M
10G------1G 40-60M
1G------1G 110M

NAS TO PC SPEED
1G -------10G 110M
10G------10G 300M
10G------1G 80M
1G------1G 110M
What ever I use swos or ros.My crs312 can't make good speed.
My nas is SYNOLOGY DS1819+ .All computer have same question.When i saw somebody has same question.I think this is a bug.
 
goodliu
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Re: Performance Issues with CRS 312-4c+8xg

Wed Mar 11, 2020 5:44 am

same problems here, nas and pc connected to crs309 with S+RJ10 modules, swos 2.1,tested with iPerf3
nas to pc 100M
pc to NAS <30MB
it's just seems like a duplex problem as in old network envionment , very disappointed about crs309...

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