Hi Jeio, Did you get this resolved? I have had a similiar issue with a Meraki copper SFP not fitting properly in an MX250 Internet 1 port. We tried a Cisco GLC-TE and it fits snug. The same Meraki SFP works in the lan ports. ... View more

To be fair I haven't tested it myself so you may well have a point there! ... View more

Thank you ... View more