CRS112 8P-4S 10Mbps CPU 100%

RouterOS Beginner Basics
1

Hello, I purchased a Mikrotik CRS112 8P 4S and I only want to use it as a PoE switch. So, all I did was create a Bridge and add all the ports to it. However, when I run a Speedtest, the CPU reaches 100% with just 10Mbps, is this normal? How can I resolve this issue?

2

Use tools → profile to see where comes the consumption.

And no, it’s not normal.

What ROS are you running? Posting config also can help.

Regards.

3

https://help.mikrotik.com/docs/display/ROS/Bridging+and+Switching#BridgingandSwitching-BridgeVLANFiltering

read and follow…

4

[Administrador@SSJ-SSB-SW01] > export

2023-07-29 21:18:54 by RouterOS 7.11beta7

software id = YI99-7ZF2

model = CRS112-8P-4S

serial number = HEC08Q1

/interface bridge
add name=“SWITCH BRIDGE” vlan-filtering=yes
/interface ethernet
set [ find default-name=ether2 ] disabled=yes
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=sfp9 ] disabled=yes
set [ find default-name=sfp10 ] disabled=yes
set [ find default-name=sfp11 ] disabled=yes
set [ find default-name=sfp12 ] disabled=yes
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip hotspot profile
set [ find default=yes ] html-directory=hotspot
/port
set 0 name=serial0
/interface bridge port
add bridge=“SWITCH BRIDGE” interface=all
/ip address
add address=10.30.1.5/29 interface=“SWITCH BRIDGE” network=10.30.1.0
/ip dns
set servers=10.20.1.1,1.1.1.1
/ip route
add disabled=no dst-address=0.0.0.0/0 gateway=10.30.1.1 routing-table=main
suppress-hw-offload=no
/system clock
set time-zone-name=Europe/Lisbon
/system identity
set name=SSJ-SSB-SW01
/system note
set show-at-login=no
/system ntp client
set enabled=yes mode=multicast
/system ntp client servers
add address=10.20.1.1
add address=224.0.1.1
/tool graphing interface
add
/tool romon
set enabled=yes
[Administrador@SSJ-SSB-SW01] >

5

This is not the problem! not normal with 10Mbps 100% CPU with or without VLAN Filtering! I make Export via Terminal and CPU go to 100%

6 
/interface bridge
add name="SWITCH BRIDGE" vlan-filtering=yes

set vlan-filtering to NO

7

Anyway it’s no sense use vlan filtering while you are not using vlans.

What says profile tool?

Regards.