my customer has some problems with performance on the WAN link. What is the Cisco recommendation for the following situation.Into the InlineGroup 1/0 is connected router into WAN port and switch into LAN port. The router has set full-duplex on the FastEthernet port(here is cross-over cable). Gigabit interface on switch is in the auto mode (here is straight cable). InlineGroup 1/0 is set to full duplex. Is it a correct setting? Or I have to set Gigabit interface on the switch to the full-duplex and speed 100? Thank you.