CRS310-1G-5S-4S+IN I can’t manage to setup trunks on all sfp ports

RouterOS Beginner Basics
1

Hello all,

I’m trying to connect the CRS310 to a HP-Switch. HP-Port is trunk with tagged vlan’s and all sfp ports on the CRS310 should also be trunk ports with tagged vlan’s to connect some other switches.

Initially the CRS310 is in bridge mode with a bridge called “bridge”. All ports are connected to “bridge”. Management is via “ether1” which is also a port on “bridge”.

I want to do this:

/interface bridge
add name=bridge1 vlan-filtering=no

/interface bridge port
add bridge=bridge1 interface=sfp1
add bridge=bridge1 interface=sfp2
etc…

/interface bridge vlan
add bridge=bridge1 tagged=sfp1 vlan-ids=1,9,20,50,51,52,53,60,110
add bridge=bridge1 tagged=sfp2 vlan-ids=1,9,20,50,51,52,53,60,110
etc…

/interface bridge set bridge1 vlan-filtering=yes

But on this step:
/interface bridge port add bridge=bridge1 interface=sfp1
I get “failure: device already added as bridge port” which is logical because interface sfp1 is used by “bridge”.

When I change the “sfp1” port to the new created “bridge1” via the GUI the CRS310 says good bye and I can’t access it anymore.

Is my first error that I’m trying to do this while the CRS310 is in Bridge-Mode?
I don’t want to run the CRS310 in Router-Mode, because I expected to use the CRS310 as a switch.

Thanks for any help

2

I’d suggest you first remove the ports from the old bridge with the following command or through GUI:

/interface bridge port
remove [ find interface=sfp1 ]
remove [ find interface=sfp2 ]

and then add them to the new bridge:

/inteface bridge port
add bridge=bridge1 interface=sfp1
add bridge=bridge1 interface=sfp2

What you can do beforehand is add bridge1 to the LAN interface list so you don’t lose access

Why don’t you just boot it in SwOS? CRS310 allows it:

/system routerboard settings set boot-os=swos
3

Program the CRS3 line with bridge vlan filtering as described here.

https://www.youtube.com/watch?v=YLtGQAQ8iS0&t=82s

4

That’s what I did, but maybe not fully understand,

5

Long story short:

After upgrading to FW 7.15 the system fan was a bit noisy with 13’000 turns p/m.

So I did return to FW 7.13.5 and after RouterOS was booting properly I also came to the conclusion why not using SwOS…
MikroTik RouterOS 7.13.5 (c) 1999-2024 https://www.mikrotik.com/

Press F1 for help

[admin@MikroTik] > /system routerboard settings set boot-os=swos
[admin@MikroTik] > system reboot
Reboot, yes? [y/N]:
y
system will reboot shortly

Rebooting…
Stopping services…
MikroTik 7.13.5 (stable)
MikroTik Login: [ 487.842856] reboot: Restarting system

BootROM 1.41
Booting from SPI flash
BootROM: Image checksum verification PASSED

RouterBOOT booter 7.8

CRS310-1G-5S-4S+

CPU frequency: 800 MHz
Memory size: 256 MiB
Storage size: 16 MiB

Press Ctrl+E to enter etherboot mode
Press key within 2 seconds to enter setup..
trying bootp protocol… OK
Got IP address: 192.168.88.3
resolved mac address B8:6B:23:6D:45:7E
transfer started … transfer ok, time=1.78s
setting up elf image… OK
jumping to kernel code
Welcome to MikroTik Router Software remote installation 7.13.5
Press Ctrl-Alt-Delete to abort

mac-address: 48:A9:8A:C7:7F:98 <<< ether1
+7 more mac-address

software-id: NRYD-BYSG key:
BTEJ5zb9mAGhnpl98tkcZg…

Checking old configuration…

Waiting for installation server… :frowning:

Ending up here and no access to the SwOS GUI

6

I was able to make swos running…

[admin@MikroTik] > /system swos upgrade
version: 2.16
status: done

[admin@MikroTik] > /system routerboard settings set boot-os=swos
[admin@MikroTik] > system reboot
Reboot, yes? [y/N]:

Rebooting…
Stopping services…
MikroTik 7.13.5 (stable)
MikroTik Login: [ 1532.112816] reboot: Restarting system

BootROM 1.41
Booting from SPI flash
BootROM: Image checksum verification PASSED

RouterBOOT booter 7.8

CRS310-1G-5S-4S+

CPU frequency: 800 MHz
Memory size: 256 MiB
Storage size: 16 MiB

Press Ctrl+E to enter etherboot mode
Press key within 2 seconds to enter setup..

model: CRS310-1G-5S-4S+
serial-number: HEG08VGTWE4
current-firmwware: 2.16p
mac-address: 48:A9:8A:C7:7F:98
ip-address: 0.0.0.0

What do you want to do?
i - board info
r - reset configuration
b - restore configuration
x - reboot
g - upgrade software
your choice:

ip address: 192.168.88.1
ip address: 192.168.9.40

7

As stated use the link I provided, then post your config, and I can show you where you went wrong or stick with swos.

8

If you want to stick with SwOS:

https://help.mikrotik.com/docs/pages/viewpage.action?pageId=76415036#CRS3xxandCSS32624G2S+seriesManual-VLANandVLANs

9

Yes I’ll go productive next week after testing a bit more this weekend.

Thank you all helping a MT newbie… without any cynical or know-it-all better comments

@MikroTik:
The system fan speed is 0 or 13k RPM and nothing in between. No settings offered to adjust. I’m just using a USB fan to keep it quiet here in my lab.
I’m a bit concerned how long the fan will last in production running 13k speed 24h

CPU Temperature 36C
Board Temperature 1 33C
Board Temperature 2 35C
FAN1 0 RPM
PSU1
PSU2

CPU Temperature 39C
Board Temperature 1 35C
Board Temperature 2 37C
FAN1 13305 RPM
PSU1
PSU2