A slow CRS109

RouterOS General
1

Hello

I bought an CRS109-8G-1S-2HnD-IN. Then I started to play around. A bit Wifi, a bit Routing. It seems to work but it was slow.
So I simplified my setup. Now it works as a pure switch. Everything what isn’t needed is disabled. Two ports are used. One for a client and one wire to my previous router.

But it is still slow. A speedtest show me that I got ~ 0.25mbit through the switch.
If I put my client directly behind the router I got ~ 12mbit. Thats what I get over my ADSL2 connection. This value is good.

Is there maybe a bad configuration in my switch or are there any other ideas what could be wrong?
The cpu is at 2%. There is no problem.

Cheers

2

Hi,

Have you checked speed/ duplex on interfaces? Do you have any firewall rules? Are you using bridges? Do the 2 ports belong to the same master port?

3

To be sure that you really set it up as a switch, please post your config

4

My link status is 1G. Looks ok.

Thats my config:

[admin@ap] > /export 
# dec/01/2016 11:47:06 by RouterOS 6.37.3
# software id = IL2B-MHDQ
#
/interface ethernet
set [ find default-name=ether2 ] master-port=ether1
set [ find default-name=ether3 ] disabled=yes
set [ find default-name=ether4 ] disabled=yes
set [ find default-name=ether5 ] disabled=yes
set [ find default-name=ether6 ] disabled=yes
set [ find default-name=ether7 ] disabled=yes
set [ find default-name=ether8 ] disabled=yes
set [ find default-name=sfp1 ] disabled=yes
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-b/g/n channel-width=20/40mhz-Ce distance=indoors frequency=auto mode=ap-bridge ssid=MikroTik-A7F116 wireless-protocol=802.11
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip dhcp-client
add dhcp-options=hostname,clientid disabled=no interface=ether1
/ip dns
set cache-max-ttl=1d1s
/ip service
set telnet disabled=yes
set ftp disabled=yes
set api disabled=yes
set winbox disabled=yes
set api-ssl disabled=yes
/lcd
set enabled=no
/lcd interface pages
set 0 interfaces=wlan1
/system clock
set time-zone-name=Europe/Berlin
/system identity
set name=ap
/system ntp client
set enabled=yes server-dns-names=0.de.pool.ntp.org,1.de.pool.ntp.org,2.de.pool.ntp.org,3.de.pool.ntp.org
/system routerboard settings
set protected-routerboot=disabled silent-boot=yes
/system watchdog
set watchdog-timer=no
/tool mac-server
set [ find default=yes ] disabled=yes
add
/tool mac-server mac-winbox
set [ find default=yes ] disabled=yes
add
5

Which ports are you plugged into now?

6

The ports ether1 and ether2. The other ports are disabled.

7

What does “interface ethernet monitor ether1,ether2” command show?

8

This output:

[admin@ap] > /interface ethernet monitor ether1,ether2
                        name: ether1     ether2
                      status: link-ok    link-ok
            auto-negotiation: done       done
                        rate: 1Gbps      1Gbps
                 full-duplex: yes        yes
             tx-flow-control: no         no
             rx-flow-control: no         no
                 advertising: 10M-half   10M-half
                              10M-full   10M-full
                              100M-half  100M-half
                              100M-full  100M-full
                              1000M-half 1000M-half
                              1000M-full 1000M-full
    link-partner-advertising: 10M-half   10M-half
                              10M-full   10M-full
                              100M-half  100M-half
                              100M-full  100M-full
                              1000M-half 1000M-full
                              1000M-full 
-- [Q quit|D dump|C-z pause]
9

So there is obviously no config problem?
Maybe my hardware is broken and I should try a new device?

0.25mbit is very slow. Every porn stream would lag. Thats a mess (:

10

This configuration is very simple and should not cause any performance issues.
Try to enable switching on different ports and do the same test.

11

I tried the Mikrotik in an other setup. I got 100mbit routed through the box with a cpu usage between 15 and 30 percent.
That looks much better.

It seems there is an problem between my router (a Fritzbox) and the Mikrotik. I had never seen such a performance problem behind this Fritzbox. But the Mikrotik works also great.

At the moment I can’t say what is realy wrong there. Maybe I need to drop my fritzbox out of the window.
But thanks for your help!

12

Hello x70b1,

I’m having the same issues as you describe with my fritzbox and my Mikrotik wAP ac. Did you have found an solution for this?