Assuming hardware L3 forwarding, believe the forwarding rate is the same for L2/L3.
"But could it forward 250Mbps using IP routing?. "
Should be able to, 250 Mbps is very, very light for this class of switch since it offers about line rate to all ports. (The non-E series should easily handle 250 Mbps too.)
3750-E Performance
⢠160-Gbps switching fabric capacity
⢠Stack-forwarding rate of 95 Mpps for 64-byte packets
⢠Forwarding rate:
⢠3750E-24TD-65.5 Mpps
⢠3750E-24PD-65.5 Mpps
⢠3750E-48TD-101.2 Mpps
⢠3750E-48PD-101.2 Mpps
⢠3750E-48PD-F-101.2 Mpps