Stations connected to CRS310 switch cannot get IP from DHCP server connected to sfpplus port

RouterOS General
1

Hello,
I struggling with very simple config with CRS310 switch (with RouterOS 7.16.1).
Switch has default config. Sfp-sfpplus1 interface is connected to the network with DHCP server. Client station (with Windows 10) is connected to the ether interface (e.g. ether3) and cannot obtain IP address from DHCP server. The same station obtains IP address from the other DHCP server connected to the non sfp port (e.g.ether5). Link on the SFP+ port is working correctly and it is possible to obtain IP address on sfp-sfpplus1 interface, but not on the bridge! It looks like there is a problem with DHCP communication between ether and sfp ports.

Very similar config with Cisco 2960-XR switch (with the same SFP+ module) works without any problems.

Has anyone encountered a similar problem?

2

Further investigation showed that there is no any traffic exchange between ether (1G) and sfp+ (10G) interfaces in a switch mode (default config after reset). Although in the router mode with SFP port configured as a WAN everything works correctly.

3

Show us config of switch (text export)..

4

It is just default config. I have also noticed that there is no traffic between two SFP+ modules..


/interface bridge
add admin-mac=78:9A:18:43:19:A9 auto-mac=no comment=defconf name=bridge
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/port
set 0 name=serial0
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=ether2
add bridge=bridge comment=defconf interface=ether3
add bridge=bridge comment=defconf interface=ether4
add bridge=bridge comment=defconf interface=ether5
add bridge=bridge comment=defconf interface=ether6
add bridge=bridge comment=defconf interface=ether7
add bridge=bridge comment=defconf interface=ether8
add bridge=bridge comment=defconf interface=sfp-sfpplus1
add bridge=bridge comment=defconf interface=sfp-sfpplus2
/ip address
add address=192.168.88.1/24 comment=defconf interface=bridge network=\
    192.168.88.0
/system note
set show-at-login=no
5

Try to check in depth what’s going on with SFP+ port and module. ROS is a bit notorious for not supporting just any SFP/SFP+ module properly …


Also verify as to which physical port corresponds to MAC address, set as bridge MAC address.