SFP Throught fast ethernet media converter

Hardware MikroTik hardware general
1

Hi,

I took a CRS328-4C-20S-4S + RM to distribute links in 1gb and 100mb mode (getting rid of media converters in the rack), but I’m having difficulties with the 10/100mb fast ethernet media converters.

I managed to link the CRS with this converter, forcing the negotiation to 100mb Full Duplex, but I still can’t see both sides in the Neighbors Lists, ping, etc …
I’m missing something?

2

100Mbit over SFP is very special. Not supported on all ports/platforms. Gigabit is the standard.

When using against media converters, disable auto-negotiation and use 1Gbps-FD

3

See
https://wiki.mikrotik.com/wiki/MikroTik_SFP_module_compatibility_table#SFP.2B_interface_compatibility_settings_with_SFP_optical_transceivers
and
https://wiki.mikrotik.com/wiki/MikroTik_SFP_module_compatibility_table#SFP_interface_compatibility_with_100M_fiber_links