I recently setup a pfsense as gateway and firewall box for my fancy new Gigabit internet service and am using C3560E as a L2 switch between pfsense and several devices. I did reset the switch before deploying.
I noticed that I am able to get around 600-900Mbps via direct connection to pfsense, but when I introduce the switch in between no matter what, traffic cannot exceed beyond 250Mbps.
and as I am checking that your switch port number Gi0/5 is having duel configuration. Please reset gig0/5 port with the command "Default interface gig0/5" and reconfigure the switch port.
Second: As per my knowledge your switch configuration command "system mtu routing 1500" is not putting any effect on your SVI communication but can you change it to maximum "system mtu routing 9000" and allow a jumbo frame also "system mtu jumbo 9198". My target to avoid packet fragmentation on your switch processor.
Third: Check your IP CEF table.
Regards, Deepak Kumar, Don't forget to vote and accept the solution if this comment will help you!